Discussion on the Technical Countermeasures of Hechuan Xujiahe Gas Reservoir Development

Abstract

The Xu-2 member of the Xujiahe gas reservoir in Hechuan gas field has a typical characteristic which is low porosity and low permeability. It is a condensate reservoir which has low dew point pressure and microcondensate oil. The development plan made in 2009, 2010, and 2011 was the key construction production phase. So far, the gas reservoir did not reach a stable life and production of scheme design. It was in the stage of production decline. The single well in the gas reservoir was affected by low porosity and tight reservoir that has a performance of low productivity. And it has a poor economic benefit by producing oil and water. Its corresponding development countermeasure should be explicit. So, getting geological reinterprets and carrying out gas well productivity analysis and development countermeasure research have great significance in Xu-2 gas reservoir. In this paper, we take Hechuan 1 area in Hechuan gas field as the research object. We use 3D seismic data processing and interpretation to clear the gas reservoir structure, entrapment, and fault. Well seismic combination was applied for sedimentary facies to clear the relationship between favorable sedimentary microfacies and effective reservoir, to realize phased reservoir prediction, and to clear development area of effective reservoir. Then, we established gas layer identification standard of logging and ensure reserves parameters again, calculated proven geological reserves, and confirmed development potential and present corresponding development countermeasures aiming at residual gas reservoir development potential [1,2,3].

Copyright 2018, Shaanxi Petroleum Society.

This paper was prepared for presentation at the 2018 International Field Exploration and Development Conference in Xi’an, China, September 18–20, 2018.

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