A New Method of Steamflooding Oil Reservoirs Using Staggered Scheduling of Injection/Production Oscillations

1993 ◽  
Author(s):  
Chieh Chu
Keyword(s):  
Oil Reservoirs ◽  
New Method

scholarly journals A New Method of Plugging the Fracture to Enhance Oil Production for Fractured Oil Reservoir using Gel Particles and the HPAM/Cr3+ System

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 446 ◽  
Author(s):  
Lei Zhang ◽  
Nasir Khan ◽  
Chunsheng Pu
Keyword(s):  
Oil Recovery ◽  
Oil Production ◽  
Oil Reservoirs ◽  
New Method ◽  
Water Flooding ◽  
Whole Process ◽  
Gel Particles ◽  
The Matrix ◽  
Water Cut ◽  
Enhance Oil Recovery

Due to the strong heterogeneity between the fracture and the matrix in fractured oil reservoirs, injected water is mainly moved forward along the fracture, which results in poor water flooding. Therefore, it is necessary to reduce the water cut and increase oil production by using the conformance control technology. So far, gel particles and partially hydrolyzed polyacrylamide (HPAM)/Cr3+ gel are the most common applications due to their better suitability and low price. However, either of the two alone can only reduce the conductivity of the fracture to a certain extent, which leads to a poor effect. Therefore, to efficiently plug the fracture to enhance oil recovery, a combination of gel particles and the HPAM/Cr3+ system is used by laboratory tests according to their respective advantages. The first step is that the gel particles can compactly and uniformly cover the entire fracture and then the fracture channel is transformed into the gel particles media. This process can enhance the oil recovery to 18.5%. The second step is that a suitable HPAM/Cr3+ system based on the permeability of the gel particles media is injected in the fractured core. Thus, the fracture can be completely plugged and the oil in the matrix of the fractured core can be displaced by water flooding. This process can enhance oil recovery to 10.5%. During the whole process, the oil recovery is increased to 29% by this method. The results show that this principle can provide a new method for the sustainable and efficient development of fractured oil reservoirs.

scholarly journals Natural fracture distribution and a new method predicting effective fractures in tight oil reservoirs in Ordos Basin, NW China

2016 ◽  
Vol 43 (5) ◽  
pp. 806-814 ◽  
Author(s):  
Jianming FAN ◽  
Xuefeng QU ◽  
Chong WANG ◽  
Qihong LEI ◽  
Liangbing CHENG ◽  
...  
Keyword(s):  
Ordos Basin ◽  
Oil Reservoirs ◽  
New Method ◽  
Natural Fracture ◽  
Tight Oil ◽  
Nw China ◽  
Tight Oil Reservoirs ◽  
Fracture Distribution

New Method Research of Tight Oil Reservoir Pulse Decay Permeability Measurement

2014 ◽  
Vol 1010-1012 ◽  
pp. 1768-1771
Author(s):  
Hai Yang Qu ◽  
Zheng Ming Yang ◽  
Ting Hu
Keyword(s):  
Steady State ◽  
Oil Reservoirs ◽  
New Method ◽  
Test Accuracy ◽  
Tight Oil ◽  
Oil Reservoir ◽  
Permeability Measurement ◽  
Good Relationship ◽  
Tight Oil Reservoir ◽  
Tight Oil Reservoirs

The permeability of tight oil reservoir is very low and general perm-plug method always has a big difference. The results can’t reach the test accuracy requirements. This paper measured 26 block rocks of Changqing tight oil reservoir and several typical tight oil reservoirs in CNPC with pulse decay new method. The result shows that the pulse decay permeability measured in the new method and steady-state Klinkenberg-corrected permeability have a good relationship. We drew a figure about the porosity and steady-state Klinkenberg-corrected permeability of these tight oil reservoirs. This research offers a technical support to the tight oil reservoirs about basic data permeability measurement.

A New Re-Fracturing Candidate Selection Method for Multi-Fractured Horizontal Well in Tight Oil Reservoirs

2021 ◽  
Author(s):  
Liang Tao ◽  
Xiaozhuo Zhang ◽  
Shubo Yang ◽  
Sheng Xian ◽  
Yuhang Zhao ◽  
...  
Keyword(s):  
Dynamic Effect ◽  
Production Performance ◽  
Oil Reservoirs ◽  
New Method ◽  
Tight Oil ◽  
Factors Affecting ◽  
Fitting Method ◽  
Tight Oil Reservoirs ◽  
Fractured Horizontal Wells ◽  
Selection Of

Abstract The selection of refracturing candidate is the primary challenge of refracturing technology. There are many factors affecting the selection of refracturing candidate for multi-fractured horizontal wells (MFHWs) and the relationship between each factor is very complicated, which makes it very difficult to select the optimal wells. A new method combining initial completion efficiency and production performance was proposed in this study to solve this problem. First, the fracture parameters were obtained by fitting method to evaluate the initial completion efficiency. Then, the geological model was established by the method of reservoir numerical simulation to evaluate the dynamic effect of production. Finally, the potential of refracturing was evaluated. The new method has been successfully applied to 30 wells of the tight oil reservoirs in Songliao Basin China. The average daily oil production was 18.5 tons/day after refracturing treatment. This research could provide significant guidance for the development of tight oil reservoirs.

A new method of water phase trapping damage evaluation on tight oil reservoirs

2019 ◽  
Vol 172 ◽  
pp. 32-39 ◽  
Author(s):  
Jian Tian ◽  
Yili Kang ◽  
Pingya Luo ◽  
Lijun You ◽  
Dujie Zhang
Keyword(s):  
Oil Reservoirs ◽  
New Method ◽  
Water Phase ◽  
Tight Oil ◽  
Damage Evaluation ◽  
Tight Oil Reservoirs
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