scholarly journals Simulation of a multistage fractured horizontal well in a tight oil reservoir using an embedded discrete fracture model

2019 ◽  
Vol 7 (5) ◽  
pp. 1485-1503 ◽  
Author(s):  
Yu‐long Zhao ◽  
Ling‐fu Liu ◽  
Lie-hui Zhang ◽  
Xu‐Yang Zhang ◽  
Bo Li
Keyword(s):  
Horizontal Well ◽  
Fracture Model ◽  
Tight Oil ◽  
Oil Reservoir ◽  
Discrete Fracture Model ◽  
Fractured Horizontal Well ◽  
Discrete Fracture ◽  
Tight Oil Reservoir

The Study of CO2 Flooding of Horizontal Well with SRV in Tight Oil Reservoir

2014 ◽  
Author(s):  
H.. Wang ◽  
X.. Liao ◽  
X.. Zhao ◽  
H.. Ye ◽  
X.. Dou ◽  
...  
Keyword(s):  
Horizontal Well ◽  
Ordos Basin ◽  
Gas Injection ◽  
Tight Oil ◽  
Oil Reservoir ◽  
Co2 Flooding ◽  
Vertical Wells ◽  
Injection Volume ◽  
Fractured Horizontal Well ◽  
Tight Oil Reservoir

Abstract As one kind of unconventional reservoirs, tight oil reservoir has become one of the main forces of oil reserves and production growth. The characteristics of tight oil reservoir are low porosity and ultra-low permeability, thus stimulated reservoir volume (SRV) should be conducted whether applying the mode of vertical wells or horizontal wells production. Tight oil reservoir is mostly developed by natural depletion or water flooding recently, but the problems are existed, including low recovery factor with natural depletion and the difficulty of water injection. To further improve the development effect of tight oil reservoir, CO2 flooding is proposed. Based on chang-8 tight oil reservoir in Ordos Basin, an oil sample of typical block is selected. The PVT experiments are conducted. The compositional numerical model of five-spot pattern is established with a horizontal well in the middle and 4 vertical wells on the edge. Based on the model, several CO2 flooding scenarios of horizontal well with different completion measures are studied. Furthermore, parameters such as the formation pressure, production rate, shut-in gas-oil ratio and total gas injection volume are optimized. The results of this study show that the recovery factor of horizontal well with SRV is higher than those of horizontal well and conventional fractured horizontal well. The minimum miscible pressure (MMP) and the total gas injection volume are two key factors of CO2 flooding effect. CO2 flooding of volume fractured horizontal well in tight oil reservoir can not only improve oil recovery, but also realize CO2 geological sequestration. It plays dual benefits of economy and environment. The study gives new ideas of CO2 flooding with volume fractured horizontal well for the Ordos Basin tight oil reservoir. It can be helpful for rapid and effective development of tight oil reservoirs in Ordos Basin.

scholarly journals Temperature Prediction Model for Two-Phase Flow Multistage Fractured Horizontal Well in Tight Oil Reservoir

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Ruidou Zhang ◽  
Yonggang Duan ◽  
Mingqiang Wei
Keyword(s):  
Horizontal Well ◽  
Two Phase Flow ◽  
Tight Oil ◽  
Oil Reservoir ◽  
Phase Flow ◽  
Thomson Effect ◽  
Temperature Prediction ◽  
Two Phase ◽  
Fractured Horizontal Well ◽  
Tight Oil Reservoir

Distributed temperature sensing (DTS) has been used for fracture parameter diagnosis and flow profile monitoring. In this paper, we present a new model for predicting the temperature profile of two-phase flow multistage fractured horizontal wells in the tight oil reservoirs. The homogeneous reservoir flow/heat transfer model is extended to the tight oil reservoir-fracture-wellbore coupled flow/thermal model. The influence of SRV area on reservoir and wellbore is considered, and the Joule-Thomson effect, heat convection, heat conduction, and other parameters are introduced into the improved model. The temperature distributions of reservoir and wellbore with different production times, water cut, and locations of water entry are simulated. The simulated results indicate that the Joule-Thomson effect will cause wellbore temperature to rise; the temperature of fractures with more water production is significantly lower than that of other fractures, and the water outlet location can be judged according to the temperature change of the wellbore. By using the improved temperature prediction model, the DTS monitoring data of two-phase flow multistage fractured horizontal well in the tight reservoir has been calculated and analyzed, and the accurate production profile has been obtained.

scholarly journals Production performance analysis of fractured horizontal well in tight oil reservoir

2017 ◽  
Vol 8 (1) ◽  
pp. 229-247 ◽  
Author(s):  
Hongwen Luo ◽  
Haitao Li ◽  
Jianfeng Zhang ◽  
Junchao Wang ◽  
Ke Wang ◽  
...  
Keyword(s):  
Performance Analysis ◽  
Horizontal Well ◽  
Production Performance ◽  
Tight Oil ◽  
Oil Reservoir ◽  
Fractured Horizontal Well ◽  
Tight Oil Reservoir
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