3D Microfacies Modeling of Tight Gas Reservoir: A Case from Changling Block, Jilin Oilfield

2014 ◽  
Vol 915-916 ◽  
pp. 1124-1127
Author(s):  
Guo Yi Zhang ◽  
Xue Li ◽  
Xiao Yu Yu ◽  
Xiao Song Li
Keyword(s):  
Tight Gas ◽  
Geological Modeling ◽  
Gas Reservoir ◽  
Gas Field ◽  
Sedimentary Characteristics ◽  
Modeling Methods ◽  
The Core ◽  
Geological Characteristics ◽  
Well Pattern ◽  
Tight Gas Reservoir

Reservoir geological model is actually used to characterize the reservoir structure and the spatial distribution of reservoir parameters and variations, thus, the prediction of reservoir parameters between wells is the core of geological modeling. In order to improve the accuracy of geological modeling, traditional cycle correlation and sequence stratigraphy method are combined to classfy the sub zones into single sand sections according to the sedimentary characteristics of Changling gas field. The study area has experienced many years of development. On one hand, researchers has a certain understanding of its underground geological characteristics. On the other hand, the well pattern is almost perfect, only the edge of study area needs a certain prediction. Therefore, deterministic and stochastic modeling methods are combined in microfacies modeling and a 3D regional microfacies model of Changling gas field is established finally.

scholarly journals Prediction of interwell connectivity and interference degree between production wells in a tight gas reservoir

2021 ◽  
Vol 11 (8) ◽  
pp. 3301-3310
Author(s):  
Mingze Gong ◽  
Jinliang Zhang ◽  
Zhaoxun Yan ◽  
Jinkai Wang
Keyword(s):  
Tight Gas ◽  
Well Test ◽  
Tight Sandstone ◽  
Gas Reservoir ◽  
Gas Field ◽  
Well Pattern ◽  
Geological Conditions ◽  
Tight Gas Reservoir ◽  
Production Wells ◽  
Sand Bodies

AbstractSulige gas field has poor reservoir physical properties and strong heterogeneity. The existing development well pattern is difficult to realize the overall effective production of reserves, especially in block SuX. Therefore, this paper takes SuX block in the east of Sulige as an example to describe an effective method suitable for the development of well pattern in this area. Combined with logging and production data, the connectivity of gas wells in X infill area in the east of Sulige is determined from the aspects of pressure, sand body, logging, performance and well test. By using the method of dynamic and static analysis, the connectivity between wells of main gas reservoir is judged. Through the analysis of flow unit, the discharge area and the stable value of well-controlled reserves are determined. The degree of interference determined by curve fitting and the distribution characteristics of sand bodies are comprehensively analyzed. A new oil well interference degree model defined by mathematical expression of production is established. The interference degree is quantified by gas production through numerical simulation. Based on the comprehensive analysis of the connectivity, interference degree and other factors in the area, it is determined that 500 * 600 well pattern is a reasonable well pattern in SuX block, and the interference degree is about 20%. Based on the analysis of the connectivity between wells and the interference degree between production wells in SuX block, the distribution and connectivity of sand bodies in tight sandstone gas field under complex geological conditions are determined. It provides a reasonable basis for the network encryption development of tight sandstone gas in this block. It provides a powerful technical support for the efficient development of different tight gas reservoirs in Sulige area.

Characteristics of gas accumulation in a less efficient tight-gas reservoir, He 8 interval, Sulige gas field, Ordos Basin, China

2016 ◽  
Vol 57 (7) ◽  
pp. 1064-1077 ◽  
Author(s):  
Ding Xiaoqi ◽  
Yang Peng ◽  
Han Meimei ◽  
Chen Yang ◽  
Zhang Siyang ◽  
...  
Keyword(s):  
Ordos Basin ◽  
Tight Gas ◽  
Gas Reservoir ◽  
Gas Field ◽  
Gas Accumulation ◽  
Tight Gas Reservoir

An integrated well-pattern optimization strategy to unlock continental tight gas reservoir in China

Energy ◽  
2020 ◽  
Vol 209 ◽  
pp. 118449
Author(s):  
Tao Zhang ◽  
Lei Zhang ◽  
Yongke Wang ◽  
Xiangyang Qiao ◽  
Dong Feng ◽  
...  
Keyword(s):  
Tight Gas ◽  
Optimization Strategy ◽  
Gas Reservoir ◽  
Well Pattern ◽  
Tight Gas Reservoir ◽  
Well Pattern Optimization

Experimental Investigation of the Damage Mechanisms of Drilling Mud in Fractured Tight gas Reservoir

2019 ◽  
Vol 141 (9) ◽  
Author(s):  
Zhouhua Wang ◽  
Yilong Qiu ◽  
Ping Guo ◽  
Jianfen Du ◽  
Huang Liu ◽  
...  
Keyword(s):  
Pressure Difference ◽  
Microscopic Analysis ◽  
Tight Gas ◽  
Drilling Mud ◽  
Gas Reservoir ◽  
Gas Field ◽  
Fracture Width ◽  
Damage Degree ◽  
Dynamic Filtration ◽  
Tight Gas Reservoir

Mud pollution seriously restricts the development of tight gas reservoirs. For the Dabei tight gas field in Tarim Basin, lots of wells show a higher skin factor on the pressure buildup test curves after drilling. Little researches on mud damage have been conducted for the fracture gas reservoir. Based on the previous researches, a dynamic filtration experimental method utilizing full diameter cores is established for fracture-porous cores under reservoir temperature. Twelve sets of dynamic filtration tests with full diameter cores (D = 10 cm) on the established device and some cuttings microscopic analysis on environmental-scanning-electron microscope/energy dispersive X-ray detector (ESEM/EDX) have been conducted. The effects of core type, fracture width, pressure difference, and mud type on mud damage are all investigated. The results show that the fractured cores suffer a more serious damage degree and exhibit lower return permeability ratio, compared with the porous cores. And the damage degree of fractured cores is proportional to the fracture width and pressure difference. The solids invasion is the key factor damaging the fractured cores, while the porous is mainly impaired by the filtrate invasion. This paper provides a scientific, in-depth understanding of the behaviors, laws, and characteristics of mud damage in fractured and porous cores.

Hybrid Well Pattern to Unlock Yan’an Tight Gas Reservoir, Ordos Basin, China

2020 ◽  
Author(s):  
Xiangzeng Wang ◽  
Lei Zhang ◽  
Tao Zhang ◽  
Xiangyang Qiao ◽  
Yongke Wang ◽  
...  
Keyword(s):  
Ordos Basin ◽  
Tight Gas ◽  
Gas Reservoir ◽  
Well Pattern ◽  
Tight Gas Reservoir
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