顺北一区断溶体油藏溶解气驱开发特征

doi:10.7657/XJPG20230209

新疆石油地质 ›› 2023, Vol. 44 ›› Issue (2): 195-202.doi: 10.7657/XJPG20230209

顺北一区断溶体油藏溶解气驱开发特征

刘学利¹(), 谭涛¹, 陈勇¹, 解慧¹, 朱苏阳²(), 吴昊镪², 向东流²

1.中国石化 a.西北油田分公司勘探开发研究院；b.缝洞型油藏提高采收率重点实验室，乌鲁木齐 830011
2.西南石油大学油气藏地质及开发工程国家重点实验室，成都 610500

收稿日期:2022-04-16 修回日期:2022-06-30 出版日期:2023-04-01 发布日期:2023-03-31
通讯作者: 朱苏阳（1989-），男，江苏如皋人，讲师，博士，油藏工程，（Tel）15828512977（E-mail）Suyang.zhu@swpu.edu.cn
作者简介:刘学利（1974-），男，辽宁建平人，教授级高级工程师，博士，油气藏开发，（E-mail）lu-cas2000_swpi@126.com
基金资助:
中国石化缝洞型油藏提高采收率重点实验室2022年度开放基金(34400000-22-ZC0607-0008)

Development Characteristics of Solution-Gas Drive in Fault-Karst Reservoirs in Shunbei-1 Block

LIU Xueli¹(), TAN Tao¹, CHEN Yong¹, XIE Hui¹, ZHU Suyang²(), WU Haoqiang², XIANG Dongliu²

1. Sinopec, a.Research Institute of Exploration and Development, Northwest Oilfield Company；b.Key Laboratory of Enhanced Recovery for Fracture-Cavity Reservoirs, Urumqi, Xinjiang 830011, China
2. State Key Laboratory of Reservoir Geology and Development Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China

Received:2022-04-16 Revised:2022-06-30 Online:2023-04-01 Published:2023-03-31

摘要/Abstract

摘要：

为确定顺北一区断溶体油藏是否有溶解气驱，通过油藏数值模拟，表征了断溶体油藏溶解气驱的特点；基于油藏工程，分析了顺北一区断溶体油藏的溶解气驱特征。研究表明，由于顺北断溶体油藏厚度大，在井底附近和油藏顶部同时发生组分重力分异，大量溶解气未被采出，形成次生气顶，发挥了溶解气的弹性能，使得井底流压的下降变缓，同时一定程度上增加了单井的动态储量，这个过程伴随着油相驱动指数的下降。随着溶解气进一步析出，次生气顶侵入井底，从而造成产油量快速递减。因此，在顺北一区断溶体油藏衰竭开发过程中，可在一定程度上利用溶解气驱，但仍需保压开发，不可任由溶解气进一步析出。

关键词: 塔里木盆地, 顺北一区, 断溶体油藏, 溶解气驱, 次生气顶, 油藏工程, 数值模拟

Abstract:

In order to confirm whether there is solution-gas drive in the fault-karst reservoirs in the Shunbei-1 block, reservoir numerical simulation was performed to characterize the solution-gas drive in the fault-karst reservoirs. Based on the reservoir engineering method, the solution-gas-drive characteristics of the fault-karst reservoirs in the Shunbei-1 block were analyzed. The study shows that due to the large thickness of the fault-karst reservoirs in the study area, component gravity differentiation occurs simultaneously near the bottom of the well and at the top of the reservoir, leaving a large amount of solution-gas unproduced and forming a secondary gas cap. Under the action of the elastic energy of solution-gas, the decline of bottomhole flow pressure slows down, and the dynamic reserves of a single well increase to a certain extent. This process is accompanied by the decline in oil-phase driving index. With the further development of solution-gas drive, the secondary gas cap invades the bottom of the well, resulting in a rapid decline of oil production. Therefore, during the depletion development of the fault-karst reservoirs in the Shunbei-1 block, the solution-gas drive can be used to a certain extent together with development under pressure.

Key words: Tarim basin, Shunbei block, fault-karst reservoir, solution-gas drive, secondary gas cap, reservoir engineering, numerical simulation

中图分类号:

TE155

刘学利, 谭涛, 陈勇, 解慧, 朱苏阳, 吴昊镪, 向东流. 顺北一区断溶体油藏溶解气驱开发特征[J]. 新疆石油地质, 2023, 44(2): 195-202.

LIU Xueli, TAN Tao, CHEN Yong, XIE Hui, ZHU Suyang, WU Haoqiang, XIANG Dongliu. Development Characteristics of Solution-Gas Drive in Fault-Karst Reservoirs in Shunbei-1 Block[J]. Xinjiang Petroleum Geology, 2023, 44(2): 195-202.

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顺北一区断溶体油藏溶解气驱开发特征

Development Characteristics of Solution-Gas Drive in Fault-Karst Reservoirs in Shunbei-1 Block

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