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

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.

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A Horizontal Drilling Breakthrough in Developing 1.5 m Thick Tight Gas Reservoir - Case Study in Risk Uncertainty Management, Ordos Basin, North China

10.2523/iptc-17486-ms ◽

2014 ◽

Cited By ~ 1

Author(s):

Haruji Muda Pranata ◽

Wu Su ◽

Bin Huang ◽

Jianjiang Li ◽

Pincheng Wu ◽

...

Keyword(s):

North China ◽

Ordos Basin ◽

Uncertainty Management ◽

Tight Gas ◽

Gas Reservoir ◽

Horizontal Drilling ◽

Tight Gas Reservoir ◽

Risk Uncertainty

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Production Data Analysis and Practical Applications in the Sulige Tight Gas Reservoir, Ordos Basin, China

Geofluids ◽

10.1155/2021/5549725 ◽

2021 ◽

Vol 2021 ◽

pp. 1-10

Author(s):

Minhua Cheng ◽

Wen Xue ◽

Meng Zhao ◽

Guoting Wang ◽

Bo Ning ◽

...

Keyword(s):

Data Analysis ◽

Ordos Basin ◽

Gas Production ◽

Production Data ◽

Gas Reservoirs ◽

Tight Sandstone ◽

Gas Reservoir ◽

Well Pattern ◽

Tight Gas Reservoir ◽

Wellbore Pressure

Successful exploitation of tight sandstone gas is one of the important means to ensure the “increasing reserves and production” of the oil and gas initiative and also one of the important ways to ensure national energy security. To further improve the accuracy of historical matching of field data such as gas production and bottom-hole pressure during the production process of this type of gas reservoir, in this study, a new expression of wellbore pressure for the uniform flow of vertical fractured wells in Laplace space based on the point sink function model of vertical fractures in tight sandstone gas reservoirs is constructed. This innovation is based on a typical production data analysis plot of the Blasingame type that uses the numerical inversion decoupling mathematical equation. After analyzing the pressure and pressure derivative characteristics of each flow stage in the typical curves, a new technique of type-curve matching was proposed. In order to verify the correctness of the model and the application value of the field, based on the previous production data of Sulige Gas Field in China, a new set of production data diagnostic chart of tight sandstone gas reservoir was formed. A case analysis showed that the application of the production data analysis method and data diagnosis plot in the field accurately evaluated the development effect of the tight sandstone gas reservoirs, clarified the scale of effective sand bodies, and provided technical support for optimizing and improving the well pattern and realizing the efficient development of gas fields.

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

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.915-916.1124 ◽

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.

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