摘要
南海西部海域部分高温高压气藏探井产能测试过程中,出现气水同出,压力恢复慢等现象,利用传统分析方法得到的二项式产能方程斜率为负,难以准确评价气藏产能,制约了该类气藏后续产能建设。本文根据南海西部高温高压气藏测试情况,考虑了产束缚水条件下气水两相渗流对产能的影响,并引入考虑应力敏感的物质平衡方程来进行测试期间非稳态压力校正,建立了高温高压气藏产束缚水条件下考虑非稳态压力校正及应力敏感的二项式产能方程,利用该方法可以反算出不产水时的储层真实产能,以此来进行高温高压气藏产能的正确评价,开发实践表明,本文建立的产能评价方法可靠,并有力推动了南海西部海域部分高温高压气藏开发。
In the process of testing the productivity of some high temperature and high pressure gas reservoirs in the western sea area of the South China Sea, usually the gas production with water together, the pressure recovery is slow,the conventional binomial slope by traditional analysis methods is negative. It will be difficult to accurately evaluate the capacity of gas reservoir, which restricts the following capacity construction of this kind of gas reservoir. In this paper, based on the high temperature and high pressure gas reservoir in west of the South China Sea test case, the productivity equation of stress sensitivity and gas watertwo phase seepage is derived, and the stress sensitive material balance equation is introduced to correct the formation pressure during the test period,then, this paper established a new method of deliverability equation considering unsteady pressure correction and stress sensitivity when the irreducible water is producted in high temperature and high pressure gas reservoirs,so as to evaluate the productivity of high temperature and high pressure gas reservoir. The development practice shows that the productivity evaluation method established in this paper is reliable and has effectively promoted the development of some high temperature and high pressure gas reservoirs in the western part of the South China Sea.
作者
刘鹏超
欧志鹏
周伟
刘凯
王文涛
LIU Pengchao;OU Zhipeng;ZHOU Wei;LIU Kai;WANG Wentao(Zhanjiang Branch of China National Offshore Oil Corporation (CNOOC) Ltd.,Zhanjiang Guangdong 524000,China)
出处
《石油化工应用》
CAS
2019年第3期18-22,共5页
Petrochemical Industry Application
基金
国家科技重大专项"大型油气田及煤层气开发"下项目"近海大中型油气田形成条件及勘探技术"子课题"莺琼盆地高温高压天然气富集规律与勘探开发关键技术(三期)"部分研究成果
项目编号:2016ZX05024-005
关键词
高温高压气藏
气水两相
应力敏感
非稳态压力校正
产能评价
high temperature and high pressure gas reservoirs
gas water two phase seepage
stress sensitivity
unsteady pressure correction
productivity evaluation
