scholarly journals Reservoir characteristics and effective development technology in typical low-permeability to ultralow-permeability reservoirs of China National Petroleum Corporation

2021 ◽  
pp. 014459872110052
Author(s):  
Xizhe Li ◽  
Zhengming Yang ◽  
Shujun Li ◽  
Wei Huang ◽  
Jianfei Zhan ◽  
...  
Keyword(s):  
Horizontal Well ◽  
Water Flooding ◽  
Low Permeability ◽  
Reservoir Characteristics ◽  
Well Pattern ◽  
China National Petroleum Corporation ◽  
Volume Fracturing ◽  
Effective Development ◽  
Oil Gas ◽  
Ultralow Permeability

Low-permeability to ultralow-permeability reservoirs of the China National Petroleum Corporation are crucial to increase the reserve volumes and the production of crude oil in the present and future times. This study aimed to address the two major technical bottlenecks faced by the low-permeability to ultralow-permeability reservoirs by a comprehensive use of technologies and methods such as rate-controlled mercury injection, nuclear magnetic resonance, conventional logging, physical simulation, numerical simulation, and field practices. The reservoir characteristics of low-permeability to ultralow-permeability reservoirs were first analyzed. The water flooding development adjustment mode in the middle and high water-cut stages for the low-permeability to ultralow-permeability reservoirs, where water is injected along the fracture zone and lateral displacement were established. The formation mechanism and distribution principles of dynamic fractures, residual oil description, and expanding sweep volume were studied. The development mode for Type II ultralow-permeability reservoirs with a combination of horizontal well and volume fracturing was determined; this led to a significant improvement in the initial stages of single-well production. The volume fracturing core theory and optimization design, horizontal well trajectory optimization adjustment, horizontal well injection-production well pattern optimization, and horizontal well staged fracturing suitable for reservoirs with different characteristics were developed. This understanding of the reservoir characteristics and the breakthrough of key technologies for effective development will substantially support the oil-gas valent weight of the Changqing Oilfield to exceed 50 million tons per year, the stable production of the Daqing Oilfield with 40 million tons per year (oil-gas valent weight), and the realization of 20 million tons per year (oil-gas valent weight) in the Xinjiang Oilfield.

The Study of Flowing Law of Typical well Patterns in Low Permeability Reservoirs

2013 ◽  
Vol 444-445 ◽  
pp. 338-341 ◽  
Author(s):  
Shu Ren Yang ◽  
Bi Yi Li
Keyword(s):  
Horizontal Well ◽  
Cost Effective ◽  
Simulation Method ◽  
Low Permeability ◽  
Low Permeability Reservoir ◽  
Well Pattern ◽  
Key Issues ◽  
Flow Law ◽  
Effective Development ◽  
Low Permeability Reservoirs

Low permeability reservoirs have abundant reserves, accounting for about one-third of all the reservoir storage, but the development is difficult and the recovery is low because of its poor natural property. Reasonable well pattern, well pattern parameters and fracture parameters can be effective in improving the development of low-permeability reservoir. Therefore, studying flow law of various well networks, choosing a reasonable well pattern and corresponding well parameters, are key issues of cost-effective development of low permeability reservoir. Based on extensive investigations of former researches, this paper studies the flow law of vertical well patterns and the effect of permeability differential on flow law. Adaptive study of those different kinds of well patterns has been done by numerical simulation method, including the five point well pattern, inverted seven point well pattern and the inverted nine point well pattern. Studying the typical horizontal well pattern on the flow law, comparing the characteristics of the streamlines. Choosing a reasonable form of well pattern and the well pattern parameters.

Application of the HW with MSHF Investigations to Manage the Development of Low-Permeability Reservoirs

2020 ◽  
Author(s):  
Andrey Shurunov ◽  
Alexander Sheremeev ◽  
Ilya Kaeshkov ◽  
Mikhail Kolesnikov ◽  
Marcel Bikkulov ◽  
...  
Keyword(s):  
Horizontal Well ◽  
Low Permeability ◽  
Optic System ◽  
Tracer Studies ◽  
Multi Stage ◽  
Production Wells ◽  
Fiber Optic System ◽  
Effective Development ◽  
The Right ◽  
Low Permeability Reservoirs

Abstract The active building of HW with MSHF use for ensuring their effective development in low-permeability reservoirs, but there are certain difficulties with getting completely information for making the right decisions during control of development. As part of the work performed, the main uncertainties and the further application of research results for estimates the profile of horizontal well (HW) with multi-stage hydraulic fracturing (MSHF) for planning the necessary geological and technical actions based on more than 20 operations at the South Priobskoye field are shown. The following field geophysical tests were executed in wells: PLT with Y-tool and CT + spectral noise logging module;PLT during compression with CT + multi-sensor flow meter;PLT with a well tractor;tracer studies (proppant, frac sleeves);thermometry with using fiber-optic system in injection and production wells.

Parameters Optimization of Stereoscopic Horizontal Well Patterns by Using Numerical Reservoir Simulation

2012 ◽  
Vol 433-440 ◽  
pp. 2602-2606
Author(s):  
Jun Lai Wu ◽  
Yue Tian Liu ◽  
Hai Ning Yang
Keyword(s):  
Reservoir Simulation ◽  
Horizontal Well ◽  
Simulation Method ◽  
Parameters Optimization ◽  
Water Flooding ◽  
Fracture Permeability ◽  
Numerical Reservoir Simulation ◽  
Well Pattern ◽  
Liaohe Oilfield ◽  
Buried Hill

Well pattern is the most important affecting factor to the ultimate recovery for an oilfield development. Many researches are reported on areal well pattern, which is widely used in conventional reservoirs development such as low permeability reservoirs, heavy oil reservoirs, multi-layer sandstone reservoirs, etc. In this paper, according to the geological characteristics of fractured buried hill reservoir of Liaohe Oilfield, we firstly present the concept of stereoscopic well patterns and compare it with common areal water flooding. By using numerical reservoir simulation method, we design and optimize the parameters of 5-spot stereoscopic horizontal well patterns, including payzone thickness and horizontal well length under different anisotropic factors of fracture permeability. This can be successfully applied on the development of MM block fractured buried hill reservoir of Liaohe Oilfield.

Research on the Technology of RFID Sliding Sleeve

2014 ◽  
Vol 496-500 ◽  
pp. 1552-1555
Author(s):  
Lei Shi ◽  
Xing Jiu Zhong ◽  
Jun Wu ◽  
Bin Li
Keyword(s):  
Field Test ◽  
Horizontal Well ◽  
Field Application ◽  
Low Permeability ◽  
Low Permeability Reservoir ◽  
The World ◽  
Volume Fracturing ◽  
Significant Application

There is a very significant application today towards multiple zone fracturing operations in a horizontal well of low permeability reservior all over the world. But the number of the ball seat activated sliding sleeves that can be run in a well is limited because of the design and cant meet the need of volume fracturing in low permeability reservoir; Also the sleeves can only be shifted by CT, which extend the length of the operation and add to the overall costs. This paper introduces a kind of sleeve which is controlled by RFID and meet the need of volume fracturing, the number of sleeves that can be run in a well using this technology is essentially unlimited and can be operated remotely[1-3]. It is eay to operate and no intervention; It is proved by field test that this sleeve is reliable and can meet the field application.

Application of the Imitation Horizontal well Technique in the Development of Low Permeability Reservoirs

2013 ◽  
Vol 734-737 ◽  
pp. 1350-1353
Author(s):  
Yan Dong ◽  
An Zhu Xu
Keyword(s):  
Horizontal Well ◽  
Influence Factors ◽  
Oil Production ◽  
Low Permeability ◽  
Daily Production ◽  
Drainage Radius ◽  
Well Pattern ◽  
Single Well ◽  
Lower Permeability ◽  
Low Permeability Reservoirs

The fluid flowing resistance increase and the water absorbing capacity reduce due to the threshold pressure gradient and media deformation of the low permeability reservoirs in the course of development. The oil production of vertical wells may decrease fastly and the controlled reservers are hard to recover. The development effects are not satisfied. Through great fracturing measurements create many fractures, and fractures extended along the direction of well line, the long fracture channels were formed like horizontal well segments. This kind of long fracture was called as horizontal segment of imitation horizontal well. It can broad drainage radius in production well and increase controlled reserves and daily oil production of single well. In this paper, the influence factors of the low permeablity reservoirs development by imitation horizontal wells were analysised. Through well pattern, well distance, line distance, injector and producer parameters and fracturing parameters of imitation horizontal well optimization, drainage radius in lower permeability reservoirs can be reached to 200 meters, the daily production in single well can increase two times of that before, and the production result was improved greatly in lower permeability reservoirs development.

scholarly journals Optimization of horizontal well pattern in low permeability layered reservoir

2021 ◽  
Vol 791 (1) ◽  
pp. 012144
Author(s):  
Wang Xia ◽  
Tao Yayuan ◽  
Wang Xiuwei ◽  
LI Jing ◽  
HU Qihao ◽  
...  
Keyword(s):  
Horizontal Well ◽  
Low Permeability ◽  
Well Pattern

Advance Water-Flooding to Reduce the Stress Sensitivity Affect on Low Permeability Reservoir Development

2011 ◽  
Vol 361-363 ◽  
pp. 520-525
Author(s):  
Jun Feng Yang ◽  
Han Qiao Jiang ◽  
Han Dong Rui ◽  
Xiao Qing Xie
Keyword(s):  
Physical Simulation ◽  
Physical Property ◽  
Stress Sensitivity ◽  
Water Flooding ◽  
Low Permeability ◽  
Formation Pressure ◽  
Exponential Relationship ◽  
Low Permeability Reservoir ◽  
Reservoir Development ◽  
Water Cut

Physical simulation experiments were made to research on the stress sensitivity on physical property of low permeability reservoir rocks. The experimental results shown that effective pressure had good exponential relationship with reservoir permeability. Combining with materaial balance method, reservoir engineering and rational deducation was made to reserach on water-flooding timing of low permeability reservoir development. Several production targets were obtained by these method, such as formation pressure, water and oil production, water cut and so on. The results shown that advanced water-flooding was very important in low permeability reservoir development to reduce the bad impact of stress sensitivity on formation permeability and maintain formation pressure.

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