安岳气田磨溪区块深层含水碳酸盐岩气藏驱动能量变化规律

doi:10.3969/j.issn.1006-6535.2021.02.012

特种油气藏 ›› 2021, Vol. 28 ›› Issue (2): 83-88.DOI: 10.3969/j.issn.1006-6535.2021.02.012

安岳气田磨溪区块深层含水碳酸盐岩气藏驱动能量变化规律

阮基富¹, 庞进², 袁权¹, 易劲¹, 欧家强¹

1.中国石油西南油气田分公司,四川成都 610051;
2.重庆科技学院,重庆 401331

收稿日期:2020-05-30 修回日期:2021-01-06 出版日期:2021-04-25 发布日期:2022-02-16
通讯作者: 庞进(1981—),副教授,2003年毕业于西南石油学院石油工程专业,2015年毕业于中国石油大学(华东)油气田开发工程专业,获博士学位,现主要从事油气田开发研究工作。
作者简介:阮基富(1983—),高级工程师,2005年毕业于西南石油大学石油工程专业,2008年毕业于该校油气田开发工程专业,获硕士学位,现主要从事气田开发研究与管理工作。
基金资助:
中国石油科技重大专项“西南油气田天然气上产300亿立方米关键技术研究与应用”(2016E-06)

Variation Rules of Driving Energy of Deep Aqueous Carbonate Gas Reservoirs in Moxi Block of Anyue Gas Field

Ruan Jifu¹, Pang Jin², Yuan Quan¹, Yi Jin¹, Ou Jiaqiang¹

1. PetroChina Southwest Oil and Gasfield Company, Chengdu, Sichuan 610051, China;
2. Chongqing University of Science & Technology, Chongqing 401331, China

Received:2020-05-30 Revised:2021-01-06 Online:2021-04-25 Published:2022-02-16

摘要/Abstract

摘要： 深层碳酸盐岩有水气藏储层孔洞、裂缝发育,岩石压缩性强,气水关系复杂,影响气藏驱动能量变化,进而导致气藏动态分析和开发方式优化差异较大。针对该问题,以安岳气田磨溪区块龙王庙气藏为例,通过实验研究深层碳酸盐岩压缩系数变化规律,建立不同类型储层的压缩系数应力敏感方程。并结合水驱气藏物质平衡方程,通过压降指示曲线来研究不同类型储层压缩系数对变容封闭气藏驱动能量变化的影响、封存水区和气水过渡带不同含水饱和度对变容气藏驱动能量变化的影响、压缩性对水驱气藏驱动能量的影响。计算009-3-X2井不同时期的驱动指数并分析其变化规律。研究结果表明:碳酸盐岩不同类型储层压缩系数差异大,缝洞型储层压缩系数应力敏感性强,开发初期岩石和孔隙水的弹性能量强,弹性驱动指数为0.317~0.535,弹性能量主要在采出程度低于20%时释放;当储层含水饱和度达60%时,地层内自由水的弹性驱动指数达0.359;当存在边底水时,边底水压驱动能量在初期较强,后期逐步减弱。研究成果可为碳酸盐岩气藏开发方式优化、产能评价和储量计算提供重要依据。

关键词: 碳酸盐岩, 驱动能量, 压缩系数, 驱动指数, 含水气藏, 安岳气田

Abstract: Deep aqueous carbonate gas reservoirs are developed with pores and fractures. The strong compressibility of rocks and the complex gas-water relationship affect the variation of driving energy in the gas reservoirs, leading to the great difference in dynamic analysis and development mode optimization of gas reservoirs. In response to this problem, taking the Longwangmiao gas reservoir in the Moxi block of the Anyue Gasfield as an example, the variation rules of the compressibility of deep carbonate rocks were studied through experiments, and the equations were established for the compressibility sensitivity to stress of different types of reservoirs. Combined with the material balance equation of water drive gas reservoirs, the pressure drop indicator curve was employed to study the influence of the compressibility of different types of reservoir on the driving energy variation of variable-volume confined gas reservoirs, and the influence of different water saturations of the connate water area and gas-water transition zone on the driving energy variation of variable-volume confined gas reservoirs, and the influence of compressibility on the driving energy of water drive gas reservoirs. Taking Well 009-3-X2 as an example, the driving indicator in different periods was calculated and its variation rules were analyzed. The results of the study showed that there was quite difference in the compressibility of different types of carbonate reservoirs, the compressibility of fracture-cavity reservoirs was sensitive to stress, the elastic energy of rocks and pore water wars strong in the early stage of development, the elastic driving indicator was 0.317 to 0.535, and the elastic energy was mainly released when the recovery percent was less than 20%; when the water saturation of the reservoir reached 60%, the elastic driving indicator of free water in the formation reached 0.359; when there was edge-bottom water, the driving energy of the edge-bottom water pressure was higher in the initial stage, and gradually weakened later. The study results provide significant basis for the optimization of carbonate gas reservoir development modes, productivity evaluation and reserves calculation.

Key words: carbonate rock, driving energy, compressibility, driving indicator, aqueous gas reservoir, Anyue Gasfield

中图分类号:

TE344

阮基富, 庞进, 袁权, 易劲, 欧家强. 安岳气田磨溪区块深层含水碳酸盐岩气藏驱动能量变化规律[J]. 特种油气藏, 2021, 28(2): 83-88.

Ruan Jifu, Pang Jin, Yuan Quan, Yi Jin, Ou Jiaqiang. Variation Rules of Driving Energy of Deep Aqueous Carbonate Gas Reservoirs in Moxi Block of Anyue Gas Field[J]. Special Oil & Gas Reservoirs, 2021, 28(2): 83-88.

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安岳气田磨溪区块深层含水碳酸盐岩气藏驱动能量变化规律

Variation Rules of Driving Energy of Deep Aqueous Carbonate Gas Reservoirs in Moxi Block of Anyue Gas Field

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