|本期目录/Table of Contents|

[1]王 磊.莺歌海盆地东方区异常高压气井产能分析方法改进[J].中国海上油气,2019,31(04):96-101.[doi:10.11935/j.issn.1673-1506.2019.04.012]
 WANG Lei.Improvement on the productivity analysis method of abnormal high pressure gas wells in Dongfang area, Yinggehai basin[J].China Offshore Oil and Gas,2019,31(04):96-101.[doi:10.11935/j.issn.1673-1506.2019.04.012]
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莺歌海盆地东方区异常高压气井产能分析方法改进()

《中国海上油气》[ISSN:1673-1506/CN:11-5339/TE]

卷:
第31卷
期数:
2019年04期
页码:
96-101
栏目:
油气田开发
出版日期:
2019-07-25

文章信息/Info

Title:
Improvement on the productivity analysis method of abnormal high pressure gas wells in Dongfang area, Yinggehai basin
文章编号:
1673-1506(2019)04-0096-06
作者:
王 磊
(中海石油(中国)有限公司湛江分公司 广东湛江 524057)
Author(s):
WANG Lei
(CNOOC China Limited, Zhanjiang Branch, Zhanjiang, Guangdong 524057, China)
关键词:
莺歌海盆地 东方区 异常高压气井 产能分析方法改进 应力敏感 水气体积比 高速非达西渗流
Keywords:
Yingqiong Basin HTHP drilling engineering risk assessment quantitative assessment
分类号:
TE328
DOI:
10.11935/j.issn.1673-1506.2019.04.012
文献标志码:
A
摘要:
针对储层应力敏感和气井产水双重因素困扰莺歌海盆地东方区异常高压气井产能正确认识的问题,利用修正后的考虑储层应力敏感和气水两相渗流能力变化的产气量方程分析了储层应力敏感强度、气井产水量和气相高速非达西流动对气井产能的影响; 同时,根据物质平衡理论推导出不考虑水侵的异常高压气藏采出程度计算方程,用于分析储层应力敏感对气藏开发效果的影响。以东方区典型测试出水井为例,分析结果表明:东方区异常高压气藏储层以中等到强应力敏感为主,其主要在气藏开发中后期影响气井产气量和开发效果; 地面水气体积比在0.000 1~0.01 m3/m3,气井无阻流量随着地面水气体积比的增加急剧下降; 气相高速非达西流动对纯气井或产水量较小的气井产能有一定影响。因此,东方区异常高压气井在开发中后期选择合理的生产压差至关重要,并且在开发过程中需要特别注意气井产水的问题。
Abstract:
Yingqiong basin in South China Sea shows the following geological characteristics, such as high temperature, high pressure, multiple pressure steps and narrow safety density window, which bring high occurrence probability of engineering risk events during drilling and difficulty in risk handling, seriously restricting the efficient and safe drilling. The results of conventional drilling risk assessment are mostly qualitative or semi-quantitative, which fail to satisfy the safety requirements of high risk drilling in Yingqiong basin, South China Sea. In this paper, the uncertainties in the formation pressure and the equivalent circulating density(ECD)of drilling fluid are analyzed firstly, and the probability distributions of formation pressure and ECD are obtained. On this basis, the generalized stress and strength interference reliability theory-based risk assessment model is derived. The analysis results of HTHP exploration wells in Yingqiong basin, South China Sea suggest that the drilling risk probability results calculated by this model are consistent with the actual risk occurrence in those wells, and this model can provide guidance for the safe operation of HTHP exploration wells in this area.

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备注/Memo

备注/Memo:
*“十三五”国家科技重大专项“莺琼盆地高温高压天然气富集规律与勘探开发关键技术(编号:2016ZX05024-005)”部分研究成果。 作者简介: 王磊,男,硕士,工程师,主要从事油气田开发前期方案、油藏数值模拟、产能评价及提高采收率等方面的研究工作。地址:广东省湛江市坡头区中海石油(中国)有限公司湛江分公司(邮编:524057)。E-mail:wanglei95@cnooc.com.cn。
更新日期/Last Update: 1900-01-01