Experimental Study on the Flow Field Distribution Law of Ultra-Low Permeability Reservoir with Inverted Nine-Spot Equilateral well Pattern

2014 ◽  
Vol 472 ◽  
pp. 1112-1116
Author(s):  
Zuo Cai Liao ◽  
Zheng Ming Yang ◽  
Qian Hua Xiao
Keyword(s):  
Experimental Study ◽  
Fluid Flow ◽  
Flow Field ◽  
Oil Reservoirs ◽  
Low Permeability ◽  
Distribution Law ◽  
Porous Flow ◽  
Low Permeability Reservoir ◽  
Well Pattern ◽  
Production Wells

Aimed at ultra-low permeability reservoir, the large natural outcrop model has been made for researching the oil reservoirs porous flow law deeply, and the inverted nine-spot equilateral well pattern also has been designed which is the commonest well patter during the oilfield exploitation. The flow fields have been measured during the experiment in different displacing period (0.3PV, 0.6PV and 1PV). The research shows that fluid flow has obvious directivity, and it strongly affected by heterogeneity of the reservoir. In addition, the regions between the edge production wells are much more difficult to be exploited.

Research on Filtration Theory and Optimization Method of Low Permeability Reservoir Injection-Production Pattern

2014 ◽  
Vol 556-562 ◽  
pp. 4634-4637
Author(s):  
Chun Sen Zhao ◽  
Zhong Ting ◽  
Feng Ping Feng
Keyword(s):  
Optimization Method ◽  
Low Permeability ◽  
Spot Pattern ◽  
Low Permeability Reservoir ◽  
Well Spacing ◽  
Well Pattern ◽  
Rectangular Pattern ◽  
Production Pattern ◽  
Narrow Row ◽  
Mixed Pattern

The study research the productivity formula in low permeability reservoir with vertical wells combined with fracturing well of the five point rectangular pattern, seven spot pattern, nine spot pattern, as well as the productivity of anti-nine rhombus fractured vertical well mixed pattern, and to which of the five-point rectangular pattern and the law rectangular fracturing well pattern optimization analysis. The analysis revealed widening well spacing, narrow row spacing, so that the shape factor well network within a certain range, can improve the development effectiveness, and when length of the crack and area of well spacing were given, can determine the length and width of rectangular pattern.

Experimental Study of the Effect of Injection Different Kinds of Water on Extra Low Permeability Reservoir

2014 ◽  
Vol 968 ◽  
pp. 206-210
Author(s):  
Tao Ping Chen ◽  
Xian Xi Su
Keyword(s):  
Experimental Study ◽  
Injection Pressure ◽  
Low Permeability ◽  
Clean Water ◽  
Scale Inhibitor ◽  
Low Permeability Reservoir ◽  
Treated Sewage ◽  
Injection Water ◽  
Ultra Filtration

The experiment study effect of injection different kinds of water on extra low permeability reservoir of Yushulin Oilfield. In the condition of actual temperature and pressure of the reservoir, through the experimental study the effect of injection different kinds of water on extra low permeability core. Experiments include injecting clean water, injecting clean water with scale inhibitor, injecting traditional treated sewage, injecting deep treated sewage, injecting deep treated sewage with scale inhibitor. The experimental results show that: Long term injecting clean water and clean water with scale inhibitor are harmless to core; Injecting traditional treated sewage, high content of oil and impurity bring injection pressure go up, the permeability of core down sharply; Injecting deep treated (aeration + flotation (PAC+PAM) + filtration + ultra filtration (FeCl3)) sewage must be added scale inhibitor, otherwise injection pressure continuously increase, permeability of the core continuously decrease, which seriously affect injection water.

Experimental Study on Stress Sensitivity of Ultra-Low Permeability Sandstones

2013 ◽  
Vol 318 ◽  
pp. 279-283 ◽  
Author(s):  
Hai Yong Zhang ◽  
Shun Li He ◽  
Guo Hua Luan ◽  
Shao Yuan Mo ◽  
Zhi Kai Lv ◽  
...  
Keyword(s):  
Experimental Study ◽  
Stress Sensitivity ◽  
Great Benefit ◽  
Experimental Results ◽  
Low Permeability ◽  
The Real ◽  
Low Permeability Reservoir ◽  
Permeability Variation ◽  
Stress Dependent ◽  
Ultralow Permeability

Ultra-low permeability rocks have plenty of microfractures. The stress-dependent permeability has a significant impact on the seepage. Previous studies are mainly on the permeability variation with stress in low permeability reservoir. But few are involved in ultralow permeability cores. In this paper, the experiment of stress sensitive ultralow permeability cores which are fabricated (both matrix cores and microfracture cores) is conducted. The experimental results shows that the permeability of microfracture low permeability cores which are fabricated increases greatly while the porosity of low permeability cores is little affected. This indicates that the fabricated microfracture cores are in line with that of the real situations of fracture media reservoir. By comparison, the permeability stress sensitive hysteresis degree of microfracture cores is not apparent and the permeability recovery degree is high in the unloading cycle. This study is of great benefit to reveals the stress sensitivity features of ultralow permeability reservoir

The Research on Effect Factors of the Polymer Flooding in Low Permeability Reservoir of Daqing Oilfield

2011 ◽  
Vol 383-390 ◽  
pp. 3809-3813
Author(s):  
Yong Li Wang ◽  
Tao Li ◽  
Zhi Guo Fu ◽  
Shu Xia Liu ◽  
Bai Lin Yu ◽  
...  
Keyword(s):  
Oil Recovery ◽  
Injection Rate ◽  
Polymer Flooding ◽  
Low Permeability ◽  
Effect Factors ◽  
Field Development ◽  
Low Permeability Reservoir ◽  
Well Pattern ◽  
Simulation Results ◽  
Enhance Oil Recovery

The pilot block is a heterogeneous reservoir with low permeability which is only 100-200(mD). Polymer flooding will be used to enhance oil recovery (EOR). Therefore, some experiment will be carried out in this pilot block .According to the simulation results, we can infer the effect factors of the polymer flooding such as concentration, injection rate, slug amounts, and well pattern. It gives us effective information for the field development plan.

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