Wei, Chenji (Research Institute of Petroleum Exploration and Development, CNPC) | Zheng, Jie (Research Institute of Petroleum Exploration and Development, CNPC) | Ouyang, Xiaohu (China Petroleum Pipeline Engineering Co., Ltd, CNPC) | Ding, Yutao (China National Oil and Gas Exploration and Development Company Ltd. CNPC) | Ding, Mingming (China National Oil and Gas Exploration and Development Company Ltd. CNPC) | Lin, Shiyao (China National Oil and Gas Exploration and Development Company Ltd. CNPC) | Song, Hongqing (University of Science and Technology Beijing)
Understanding the heterogeneity is critical for a successful water injection in a carbonate reservoir. Thief zone is one of the most obvious forms of heterogeneity, which indicates the thin layer with higher permeability compared to the average reservoir permeability. The existence of thief zone results in earlier water breakthrough and faster water cut increase, which then lead to lower sweep efficiency and smaller recovery factor. Therefore, determining the distribution of thief zone and its impact towards production, and proposing a corresponding development plan are very important.
In this paper, a novel method is established to determine the thief zone distribution based on dynamic surveillance data. A new index is proposed as the relative contribution index to characterize the relative contribution of a certain layer, which is fundamental for thief zone determination. In addition, effect on water flooding development of thief zone's location is studied by experimental and theoretical analysis. The changes of water cut and production rate are analyzed under different conditions such as location of the thief zone, injection rate, and variogram. Finally, optimized development strategy is proposed to deal with the existence of thief zone.
Distribution of thief zone is characterized based on the proposed method, which indicates that thief zone development has intimate relationship with depositional facies and diagenesis. Experimental and theoretical analysis results show that the present model considering stratified water-flood is consistent with the experimental results. The water displacement effect is the best when the thief zone is located in the upper reservoir. This paper also points out the optimal adjustment period for water shutoff and profile control of the reservoir with thief zones. In addition, the greater the injection rate, the faster the water cut increase. Furthermore, the smaller the variogram, the slower the water cut increase, and the later the water breakthrough time.
This study provides a method to characterize thief zone, which can be used as a reference for similar oilfield development. In addition, it provides a quick and reasonable guide in the later adjustment of water flooding development of carbonate reservoirs with thief zones.
This seminar will teach participants how to identify, evaluate, and quantify risk and uncertainty in everyday oil and gas economic situations. It reviews the development of pragmatic tools, methods, and understandings for professionals that are applicable to companies of all sizes. The seminar also briefly reviews statistics, the relationship between risk and return, and hedging and future markets. Strategic thinking and planning are key elements in an organisation’s journey to maximise value to shareholders, customers, and employees. Through this workshop, attendees will go through the different processes involved in strategic planning including the elements of organisational SWOT, business scenario and options development, elaboration of strategic options and communication to stakeholders.
The F field in the Middle East currently has more than 40 producing wells in the center of the structure. The uneven well distribution limits the understanding of 3D reservoir characterization, particularly in the flank areas. A new technique that analyzes scanning electron microscope (SEM) images of formation samples has been used to measure porosity and total organic carbon (TOC) in the Wolfcamp Shale of the Delaware Basin in west Texas.
Two more oil fields in Libya are being closed after an armed group took over pipelines to both deposits, further disrupting the OPEC nation’s plan to boost crude production. Libya halted loadings from its biggest oil field in the latest disruption to the nation’s crude production and shipments. Libya’s biggest oil field, Sharara, is “back to normal” after a disruption caused by protests in the politically fragmented country, the state National Oil Corp. (NOC) said.
Just as Libya resumes oil exports from recently shuttered ports, an attack on its largest field is setting back progress yet again. Oil production at Libya’s Sharara field, the country’s largest, was resuming on 6 September after a valve was reopened on a pipeline shut by an armed group for more than 2 weeks, Libyan oil industry sources said. Two more oil fields in Libya are being closed after an armed group took over pipelines to both deposits, further disrupting the OPEC nation’s plan to boost crude production. Libya halted loadings from its biggest oil field in the latest disruption to the nation’s crude production and shipments. Libya’s biggest oil field, Sharara, is “back to normal” after a disruption caused by protests in the politically fragmented country, the state National Oil Corp. (NOC) said.
Anadarko Petroleum wants a fleet of at least six vehicles with armor heavy enough to stop AK-47 bullets at its natural-gas project in Mozambique. And it needs them soon. By examining two very different security-risk environments, this paper will illustrate how easily security-related human-rights risks can go unnoticed unless care is taken early in the risk-management process. A third Damen security vessel will be deployed to provide security and other support services to the international offshore oil companies active off the coast of Nigeria in the Gulf of Guinea, in cooperation with the Nigerian Navy. Sinopec’s Shengli oil field became the latest victim of the ransomware that hobbled big business across the globe.
When the head of Libya’s state energy company visited Sharara oil field in early July, community leaders and workers crowded into a conference room to ask about jobs, training, and services for local people. Public acceptance is a major challenge for the siting of facilities. The offering of compensation to communities potentially helps to create the perception of a fairer distribution of local risks and nonlocal benefits. This may help to prevent or solve siting controversies. Anadarko Petroleum said late on 30 June that it has tested more than 4,000 active oil and gas lines and plugged another 2,400 inactive ones per a state order issued after a fatal home explosion in Firestone, Colorado, in April.
The author writes that the generally accepted Knudsen diffusion in shales is based on a mistranslation of the flow physics and may give theoretically unsound predictions of the increased permeability of shales to gas flow. An extensive laboratory study was carried out with two objectives: to evaluate the effect of water quality on injectivity of disposal wells with reservoir core plugs and to restore injectivity of damaged wells. The F field in the Middle East currently has more than 40 producing wells in the center of the structure. The uneven well distribution limits the understanding of 3D reservoir characterization, particularly in the flank areas.
At its core, ESG investment involves gauging a company’s long-term, rather than short-term sustainability. Equinor is using its digital transformation to be more sustainable. The report, the first by a Chinese company in Saudi Arabia, outlines how Sinopec is fulfilling its economical, safety, environmental, and social responsibilities in Saudi Arabia. This paper presents the recent expansion of UNFC guidance to cover social and environmental effects and the further transformation of the system to make it a valuable tool in resource management for governments and businesses. On Earth Overshoot Day, humanity will have used nature’s resource budget for the entire year, according to the Global Footprint Network, an international sustainability organization. The ruling protects half a million acres of land in the Amazon forest on which the Waorani have lived for centuries from being earmarked for oil drilling, campaigners said. US Shale Firms Put Up $16.5 Million To Build West Texas Charter Schools Twenty top US energy companies agreed to contribute $16.5 million to open new schools in West Texas, where an influx of oil and gas workers have strained schools, roads, and other civic services.
A ring of at least five people targeted syntactic foam, a key material for deepwater oil drillers that also has military and commercial uses. The author argues that the advent of cloud technology should not be regarded as a further challenge to security but an opportunity to revitalize and improve a company’s defenses dramatically. Cybersecurity firm Dragos has identified a new threat to the oil and gas industry, HEXANE. The company has also released a report assessing the cybersecurity environment in oil and gas. A recent episode involving three, allegedly Iranian, vessels and a British-flagged tanker near the Strait of Hormuz is just one of the recent events of this nature.