Key technologies for the integration of deepwater natural gas exploration and development and their application in the Qiongdongnan Basin

被引：0

作者：

Chen K. ^{[1
]}

Song R. ^{[1
]}

Han G. ^{[1
]}

Xu T. ^{[1
]}

Zheng F. ^{[1
]}

He Y. ^{[1
]}

Dou J. ^{[1
]}

Zhan Y. ^{[1
]}

机构：

[1] CNOOC China Limited Zhanjiang Company, Zhanjiang

来源：

Natural Gas Industry | 2020年 / 40卷 / 12期

关键词：

Central canyon in the deepwater area; Integration of natural gas exploration and development; Qiongdongnan Basin; Target drilling technology; Target evaluation technology; Target search technology;

D O I：

10.3787/j.issn.1000-0976.2020.12.007

中图分类号：

学科分类号：

摘要：

The central canyon in the deepwater area of the Qiongdongnan Basin faces some problems in the exploration and development of deepwater natural gas, such as high exploration and development cost and difficult production of some proved and controlled geological reserves. In order to solve these difficulties and promote the efficient exploration and development of deepwater gas fields in this area, this paper studied the key technologies for the integration of deepwater natural gas exploration and development in this area based on reservoir geological and geophysical data, including target search technology, target evaluation technology and target drilling technology. And the following research results were obtained. First, target search technology not only includes the "zonal potential target search technology" under the guidance of regional law, but also "search technology during target evaluation" and "search technology during tracking while drilling" which are formed in the process of target evaluation and tracking while drilling. And after searching, 17 potential targets are totally selected and the determined potential natural gas resource is about 1 600×108 m3. Second, target evaluation technology makes use of various technological means to analyze the selected potential targets from the aspects of trap, sedimentary reservoir, hydrocarbon accumulation condition, resource prediction, development scheme and well arrangement. And Kuai 4 structure of L17 Gasfield, L18-4 structure of L18 Gasfield and L25W structure of L25 Gasfield are selected for further treatment. Third, target drilling technology can upgrade controlled reserves and increase reserves and production in flexible drilling modes of appraisal well, such as exploration mode and development mode. And four treated wells are successful with 130 m gas layers drilled, accelerating the process of gas field development. In conclusion, the application of exploration-development integrated technology can not only clarify the hydrocarbon accumulation laws of main gas bearing series of strata in this area, but also shorten the exploration and development cycle and improve reserve producing degree and efficiency. © 2020, Natural Gas Industry Journal Agency. All right reserved.

引用

页码：59 / 70

页数：11

共 31 条

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