Muryanto, B. H. (Total E&P) | Fransiskus, W. (Total E&P) | Wijaya, R. (Total E&P) | Styward, B. (Total E&P) | Ji, Y. (Halliburton) | Albertson, E. (Halliburton) | Sudirgo, A. W. (Halliburton) | Hutahaean, A. (Halliburton) | Widyastuti, A. (Halliburton)
Multizone single-trip gravel-pack (MZ-STGP) completion systems not only save rig time to complete wells with long multilayer intervals but can significantly reduce capital and operational expenditures by standardizing completion design and simplifying operation complexity. It can also help improve quality, health, safety, and environment (QHSE) performance for a long-term project development. This paper discusses a case history of an operator in Indonesia developing a major offshore field primarily with MZ-STGP completion systems to produce marginal reservoirs. A MZ-STGP system was selected to reduce multizone gravel-packing operation time as compared to conventional stacked-pack systems. The main focus was to standardize completion design and help improve system reliability and operational efficiency, which is associated with both logistic preparation and field execution.
Andrieu, J. (Engineered nanoProducts Germany AG) | Kutzky, B. (Engineered nanoProducts Germany AG) | Schackmann, B. T. (Engineered nanoProducts Germany AG) | Mahardhini, A. (Total) | Abidiy, I. (Total) | Poitrenaud, H. M. (Total)
Tunu field, which is located in Mahakam area, consists of sandstone reservoir. Due to the maturity of the field, producing layer has moved from the deep zone, which has consolidated sand, into shallow zone, which has unconsolidated sand. Hydrocarbon production from shallow zone is unmanageable without having primary sand control downhole.
Here, we present a new type of sand consolidation composite (or hybrid) low-viscous binding material, based on combination of both inorganic and organic components. After describing the properties of this material, like low viscosity and strong adhesion to sand surface, we introduce the models used in the laboratory to stay as close as possible to the injection parameters on the field. We present the results of consolidation and regained permeabilities obtained in the laboratory with this binder on several substrates (loose sand and sand stone cores) with various porosities. The formulation was tested with success on samples ranging from several darcys down to 80 millidarcys. It is also noteworthy that samples display strong consolidation after extensive brine-based overflush.
Then, this paper discusses the results obtained during eight field trials divided into three successive campaigns. The volume of water-based overflush was identified as the main parameter to find the right balance between consolidation strength without sand production and expected productivity. We achieved improvement of the formulation as well as learning curve from each campaign. After first campaign with 6 pore volumes overflush, three wells out of five produced sand free. During second campaign (1.5 pore volume overflush), two wells were treated and able to produce sand free with average gas rate 1 MMscfd (million standard cubic feet per day), after productivity impairment was solved. The trial on one well in a third campaign with 3 pore volumes overflush was successful, with the well producing sand free with average gas rate 0.8 MMscfd.
Hartono, A. D. (Kyushu University) | Hakiki, F. (King Abdullah University of Science and Technology) | Syihab, Z. (Institut Teknologi Bandung) | Ambia, F. (SKK Migas) | Yasutra, A. (Institut Teknologi Bandung) | Sutopo, S. (Institut Teknologi Bandung) | Efendi, M. (Pertamina Upstream Technology Center) | Sitompul, V. (Pertamina Upstream Technology Center) | Primasari, I. (Pertamina Upstream Technology Center) | Apriandi, R. (Pertamina Upstream Technology Center)
EOR preliminary analysis is pivotal to be performed at early stage of assessment in order to elucidate EOR feasibility. This study proposes an in-depth analysis toolkit for EOR preliminary evaluation. The toolkit incorporates EOR screening, predictive, economic, risk analysis and optimisation modules. The screening module introduces algorithms which assimilates statistical and engineering notions into consideration. The United States Department of Energy (U.S. DOE) predictive models were implemented in the predictive module. The economic module is available to assess project attractiveness, while Monte Carlo Simulation is applied to quantify risk and uncertainty of the evaluated project. Optimization scenario of EOR practice can be evaluated using the optimisation module, in which stochastic methods of Genetic Algorithms (GA), Particle Swarm Optimization (PSO) and Evolutionary Strategy (ES) were applied in the algorithms. The modules were combined into an integrated package of EOR preliminary assessment. Finally, we utilised the toolkit to evaluate several Indonesian oil fields for EOR evaluation (past projects) and feasibility (future projects). The attempt was able to update the previous consideration regarding EOR attractiveness and open new opportunity for EOR implementation in Indonesia.
Aerial surveillance for oil and gas operations can help in decision making process for a quick and appropriate response to deal with matters that potentially detrimental to the country. SKK Migas, in supervising and controlling the upstream oil and gas activities in Indonesia have made a good security system and mutually coordinated between operators and other institutions, but there are still several of that difficult to be covered and need to be improved by using technology effectively. Based on the issue reviewed it was recommended to utilize technology-based security systems to improve the security of the operator's working area and develop a security system with the support of drone technology in collecting pictures and videos oil and gas activities. Photos and videos obtained through the drone and then compiled to give an overview of monitoring activities, analysis, and geographic location conditions in the working area. Aerial surveillance activities by drones in the pipeline operation and maintenance area show the growth of residential areas along the pipeline right of way and the increase of population and industrial activities in the vicinity so that will affect to the increase of the potential risk of pipe explosion. By using drone technology to monitor the pipeline operation and maintenance area, it can help for a quick and appropriate response to prevent a greater risk and implement procedures to minimize impact on the environment. This paper outlines the utilization of drones to monitor the gas pipeline network in one of the oil and gas operation and concluded by recommending the use of drones to provide a snapshot of operational safety and prevent risks to the community.
Wijaya, R. (Total E&P) | Muryanto, B. (Total E&P) | Wahyudhi, F. (Total E&P) | Styward, B. (Total E&P) | Sinaga, H. A. (Total E&P) | Masrur, M. (Total E&P) | Syafrudin, M. (Total E&P) | Kundoko, B. (Total E&P) | Daris, M. F. (Total E&P) | Nugroho, H. M. (Total E&P) | Ridhonmas, A. (Total E&P)
This paper presents analysis of Multi Zone Single Trip Gravel Pack (MZ-STGP) experience and performance in Total E&P Indonesie for more than decade in challenging field environment and global market condition. MZ-STGP has been utilized as a robust sand control completion methodology for sand prone reservoirs in Mahakam Delta since 2006. It enables saving of 3-6 days of rig time depending of well configuration compared to classic stack Gravel Pack (GP). More than 250 wells have been completed with satisfactory result and later drive the company business strategy.
Since the downturn of oil and gas industry in year 2014, a "cost efficiency project" called
The purpose of this paper is to provide the MZ-STGP practical steps implemented over the past few years using
Benidiktus, G. Massuka (TOTAL E&P Indonesie) | Andar, Trianto (TOTAL E&P Indonesie) | Sinto, Yudho (TOTAL E&P Indonesie) | Bayu Setyo, Handoko (TOTAL E&P Indonesie) | Iswahyuni, F. Hayati (TOTAL E&P Indonesie)
This paper describes a new methodology to identify the un-swept areas for future infill well location in Handil shallow zone. This methodology has been proven by more recent Handil shallow oil (HSO) wells results.
Handil shallow oil zone plays an important role as it contributes to 60% of today’s Handil oil production. Shallow zone was initially produced in 1977, reached its peak of production 37,000 BOPD, in 1981 and continued to decline until the lowest level of 2,500 BOPD in 2005. The re-development project was started in 2005 to revive the contribution from shallow zone. The project has delivered 42 HSO wells to date with cumulative production of 26 MMstb and current average production of 10,000 BOPD.
The reservoirs are fluvio-deltaic sand with strong aquifer support which maintains the reservoir pressure in hydrostatic level. The compartmentalization of the reservoir by faults and facies heterogeneity, combined with HSO wells production impact, resulted in variation of water movement within the same stratigraphic layer in one reservoir segment. The tilting oil water contact (OWC) was observed and it reveals the opportunity to find un-swept areas in mature field. This phenomenon was observed in HSO wells drilled since 2005 to 2015. The behavior of fluid contact was analyzed from log, confirmed by formation tester and from production logging tool (PLT) in existing production wells.
A new methodology was introduced to identify the un-swept areas for future infill well location. Detail reservoir correlations within individual deltaic cycle of more than 400 wells, integrated with reservoir dynamic synthesis, were performed to define the reservoir architecture and to characterize the water movement (actual and future OWC). The 3D reservoir model was built according to these syntheses and an individual dynamic region with similar OWC movement within the same stratigraphic layer was created to honor the compartmentalization of reservoirs. This has led to the identification of un-swept areas in top structure and also in the flank areas with less production activity.
The methodology has become a game changer in finding remaining oil. More infill well locations are identified by using this approach for future Handil field development.
In the current low oil price context, operation of low productive asset is very challenging, particularly to maintain the integrity while production deliverable is not significant. This situation is experienced in Tunu Gathering and Testing Satellites (GTS) operation, where 4 out of 39 GTS have been confirmed low producers since the last 4 years. For optimization scheme, preservation was proposed where GTS-H was selected as pilot case. This paper will focus on detail assessments that carried out during preparation phases, including stakes review, preservation scheme definition, safety, cost benefit analysis, and overall impact to operation. Result of GTS-H pilot project confirmed that preservation is a cost effective method to continue operation of non productive asset. Project management approach is an applicable method to execute low cost preservation, which is recommended to be applied to other low producer facility. Comprehensive review at preparation stage is outmost important, not only cost - benefit review, but also all operational aspects, most importantly safety and integrity related. Changes in operation scheme after preservation shall be assessed properly and justified with risk base analysis.
Tuesday, October 17 GP01 Opening Session Pecatu Halls 3 & 5 GP02 Executive Plenary Session: Energy Resilience through Efficiency, Collaboration and Technology Pecatu Halls 3 & 5 Moderator(s) Craig Douglas Stewart - PT. Medco Energi Internasional Speaker(s) Javier Rielo - Total E&P Asia Pacific, Christina Verchere - BP, Visal Leng - GE Oil & Gas Our industry has had to persevere a significant downturn over the last several years due to the drastic drop in oil and gas prices. To survive and thrive in this dynamic environment, and to continue to provide energy to our many stakeholders, the industry has had to transform itself and will need to continue to do so. This has and will need to be achieved through improved efficiency to create a sustainable operational blueprint, employing new strategies for collaboration between operators and the service sector and leveraging innovative technologies. This Executive Plenary Session brings together an esteemed group of industry players, representing the perspectives of National Oil Companies, International Oil Companies and major Service Companies, to discuss the achievements and outlook on this journey to energy resilience. Oil price have declined sharply since 2014.
The Elk Hills field has produced more than 1.9 billion barrels of oil equivalent with 555 million barrels from the Eastern Shallow Oil Zone (ESOZ) since discovery in 1919. The longevity and success of the ESOZ reservoir is attributed to the introduction of immiscible gas injection. The ESOZ structure is a plunging anticline with a relatively flat crest and steeply dipping flanks. On the northern half of the structure a salt water aquifer encroached up structure providing the majority of the energy for the oil produced prior to the implementation of gas injection. The energy in the reservoir was eventually depleted at which point gravity drainage and gas cap expansion, in the form of gas injection, became the primary drive mechanisms. This paper will focus on one fault block within the field and highlight the efficiencies seen from up-dip immiscible gas injection in the presence of a down-dip aquifer.
Multi Zone Single Trip Gravel Pack (MZ-STGP) system has been the solution for developing sand prone reservoirs in the Mahakam Delta, Indonesia. Despite providing cost effective solutions, few sand control failures has been recorded. It is deemed necessary to understand the cause of sand control failure and prevent it in the future. Sand control failure may be related to unique design of MZ-STGP or general gravel pack (GP) design.
Initial investigation reveals that poor gravel packing quality may be one of sources of sand control failure. Combined with other tools, gamma ray and saturation logging help to assess gravel pack quality. At the same time, they may also be used to detect invasion from fine particles causing drop of productivity.
After extensive investigation from logging datas, three main causes of MZ-STGP were identified as bridging and incomplete gravel pack pumping, sand retention problem and low proppant coverage. This paper describes the actions to improve robustness of sand control, as well as the implementation of fines migration additives in order to improve the productivity.
To date, a database of GP zones has been created. More than 25 new wells and more than 100 zones were assessed prior put on production to assure no anomaly on gravel pack quality and assuring correct clean up procedure is applied. This contributes to no major sand control failure despite extensive gravel pack operation in Mahakam block.