Africa (Sub-Sahara) Aminex Petroleum Egypt (APE), a subsidiary of UK-based Aminex, discovered oil at its South Malak-2 (SM2) well on the West Esh el Mellaha-2 concession in Egypt. Based on the findings at SM2, a full field development program will be presented to the Egyptian authorities and the joint venture partners before commercial development.
Africa (Sub-Sahara) ExxonMobil subsidiary Esso Exploration Angola has started oil production at the Kizomba Satellites Phase 2 project offshore Angola. The project involves the development of subsea infrastructure for the Kakocha, Bavuca, and Mondo South fields. Mondo South is the first field to begin production, and the other two satellite fields will follow later this year. The goal is to increase Block 15's production to 350,000 BOPD. Esso (40%) is the operator with BP Exploration Angola (26.67%), Kosmos Energy discovered gas at the Tortue West prospect in Block C-8 offshore Mauritania.
Africa (Sub-Sahara) Eni discovered gas and condensate in the Nkala Marine prospect offshore Congo. The discovery could hold from 250 MMBOE to 350 million MMBOE in place, the company said. In a production test, the Nkala Marine 1 discovery well in the Marine XII block yielded more than 10 MMcf/D of gas and condensate. Eni is the operator with a 65% interest in the block. The remaining shares are held by New Age (25%) and Societé Nationale des Pétroles du Congo (SNPC) (10%). Sonangol and Total will break ground on a deepwater oil pumping project that will increase Angola's production by more than 30,000 B/D.
Africa (Sub-Sahara) ExxonMobil will drill its first exploratory well offshore Liberia this month, the company announced on 18 October. A deepwater well is planned on the Liberia-13 Block, which is about 50 miles off the coast of the West African country. Solo Oil plans to spud the Ntorya-2 appraisal well in Tanzania next month. The drilling pad is a mile southwest of the 2012 Ntorya-1 discovery well, which was tested at rates of 20.1 MMcf/D of gas and 139 B/D of condensate. An independent report estimated the discovery to hold 153 Bcf of gas in place, of which 70 Bcf is considered a gross best-estimate contingent resource. A gross best estimate of more than 1 Tcf of gas in place has been made for the Ntorya prospect as a whole, in which the company has a 25% interest. Asia Pacific BP has decided to abandon drilling plans in the Great Australian Bight offshore southern Australia, an area in which prospective drilling has long been contested by environmentalists.
SDX Energy has made two discoveries in Egypt. The discovery is under evaluation, after which the company expects to complete the well as a producer and connect it to central processing facilities at Meseda. SDX holds a 50% interest in the concession and is joint operator with Dublin Petroleum. SDX also discovered natural gas at the company-operated Ibn Yunus-1X exploration well at South Disouq. Drilled to a 9,068-ft total depth, the well encountered 101 ft of net conventional gas pay in the Abu Madi horizon.
Gas is flowing in the second phase of the West Nile Delta development offshore Egypt, operator BP reported this week. Production, currently at around 400 MMcf/D, is expected to reach 700 MMcf/D at peak. Developed as a long-distance deepwater tieback to an onshore plant, the second phase includes eight wells producing from the Giza and Fayoum fields. The West Nile Delta project as a whole consists of five gas fields across the North Alexandria and West Mediterranean Deepwater offshore concessions, 65–85 km off Alexandria. Phase 1 of the project, launched last year, consists of gas production from the Taurus and Libra fields.
Drilling deviated wells is a frequently used approach in the oil and gas industry to increase the productivity of wells in reservoirs with a small thickness. Drilling these wells has been a challenge due to the low rate of penetration (ROP) and severe wellbore instability issues. The objective of this research is to reach a better drilling performance by reducing drilling time and increasing wellbore stability.
In this work, the first step was to develop a model that predicts the ROP for deviated wells by applying Artificial Neural Networks (ANNs). In the modeling, azimuth (AZI) and inclination (INC) of the wellbore trajectory, controllable drilling parameters, unconfined compressive strength (UCS), formation pore pressure, and in-situ stresses of the studied area were included as inputs. The second step was by optimizing the process using a genetic algorithm (GA), as a class of optimizing methods for complex functions, to obtain the maximum ROP along with the related wellbore trajectory (AZI and INC). Finally, the suggested azimuth (AZI) and inclination (INC) are premeditated by considering the results of wellbore stability analysis using wireline logging measurements, core and drilling data from the offset wells.
The results showed that the optimized wellbore trajectory based on wellbore stability analysis was compatible with the results of the genetic algorithm (GA) that used to reach higher ROP. The recommended orientation that leads to maximum ROP and maintains the stability of drilling deviated wells (i.e., inclination ranged between 40°—50°) is parallel to (140°—150°) direction. The present study emphasizes that the proposed methodology can be applied as a cost-effective tool to optimize the wellbore trajectory and to calculate approximately the drilling time for future highly deviated wells.
The advanced technology has made directional drilling widely used to enhance the production of mature fields. The rate of penetration (ROP) contributes strongly towards the cost of drilling operations, where achieving higher ROP leads to substantial cost saving. The main objective of this study is to develop a model that predicts the ROP for deviated wells using artificial neural networks (ANNs).
The model was developed based on the most critical variables affecting ROP using ANNs. In addition to the azimuth and inclination of the well trajectory, the controllable drilling parameters, unconfined compressive strength (UCS), pore pressure, and in-situ stresses of the studied area were included as inputs. 1D Mechanical earth modeling (1D-MEM) data, geophysical logs, daily drilling reports, and mud logs (master logs) of deviated wells drilled in Zubair field located in Southern Iraq were used to develop the ANN model.
The results displayed that the ANN’s outputs are close to the measured field data. The correlation coefficient (R) and average absolute percentage error (AAPE) were over 0.91 and 8.3%, respectively, for the training dataset. For testing data, the developed model achieved a reasonable correlation coefficient (R) of 0.89 and average absolute percentage error (AAPE) of 9.6%. Unlike previous studies, this paper investigates the effect of well trajectory’s (azimuth and inclination) and their influence on the ROP for deviated wells. The major advantage of the present study is calculating approximately the drilling time of the deviated well and eventually reducing the drilling cost for future neighboring wells.
Finding and starting a new career can be a fairly straightforward process for some or a daunting task for others. The transition may start in the mind when one begins to first foster thoughts about it. A significant change in direction, particularly when it breaks free of the status quo imposed by a peer group, often comes with its share of self-doubt lurking in the corner. However, when one does go through with the career transition, there are often rewarding results, although sometimes not in ways initially envisaged. You will read about how the transitions improved the careers and lives of the individuals, the motivation behind the change, and what had to be sacrificed to see it through. Read on to see how previous experiences help with career transitions, what sorts of resources were invaluable in managing the transition, and the soft skills that were relevant in ensuring that the career transition was a success. I believe that one of my biggest professional transitions, which set me onto my current path, was switching from film and physics studies to petroleum engineering. In 2004, I was attending university in Florida.
The Zohr Field offshore Egypt is now flowing at more 2 Bcf/D, or 365,000 BOE/D, less than a year after it started production. The benchmark comes as operator Eni solidifies concession agreements and ramps up exploration and development in the North African country. The Italian multinational firm has stared up the project's fifth production unit, T4, which consists of eight production wells and a 218-km, 30-in. OD pipeline commissioned last month. Production is expected to plateau at more than 2.7 Bcf/D in 2019.