Analysis on Produced Water Source in Well Gaotan-1 and How to Keep Stable Production

doi:10.7657/XJPG20210112

Abstract

Abstract:

Well Gaotan-1, which is located in the Sikeshu sag in the southern margin of the Junggar basin, hit the high-yield record of more than one thousand tons of oil per day per well from onshore clastic reservoirs in China. During the second production test for getting the highest production, the water cut from the well increased from 0% to 18.17%. At present, only Well Gaotan-1 was put into production nearby. Without cores taken from the pay zone, or liquid production performance and long-term flowing pressure data, it is difficult to understand the produced water source and its mechanism. To identify the water source, water breakthrough features and mechanism, and to design a reasonable working system for long-term high and stable production, static and dynamic data were analyzed and wellbore simulation, dynamic analysis and reservoir numerical simulation were carried out to help logging interpretation and water diagnosis. Finally, Well Gaotan-1 realized stable water cut and sustainable stable production in combination with fine field adjustment. The findings are references to guiding formation test, production test and collection of dynamic data for other production wells, and help promote the process of exploration and development in the southern margin of the Junggar basin.

Key words: Junggar basin, Sikeshu sag, Well Gaotan-1, clastic reservoir, produced water source, water breakthourgh mechanism, reservoir

CLC Number:

TE343

BA Zhongchen, QIU Zigang, ZHANG Zongbin, CHEN Xinyu, KONG Chuixian, QIN Jun. Analysis on Produced Water Source in Well Gaotan-1 and How to Keep Stable Production[J]. Xinjiang Petroleum Geology, 2021, 42(1): 88-93.

Figures/Tables 7

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