基于碳酸盐岩储层裂缝表征与产能描述的开发技术对策：以川西北双鱼石区块栖霞组气藏为例

Development technical countermeasures based on fracture characterization and productivity description of carbonate reservoir: taking Qixia Formation gas 
reservoir of Shuangyushi block in northwest Sichuan Basin as an example

蔡珺君 戴瑞瑞 任勇 彭先 李隆新 刘微 王蓓 刘微

中国石油西南油气田公司勘探开发研究院，四川 成都 610041 中石油煤层气有限责任公司勘探开发建设分公司，陕西 西安 710082 中国石油西南油气田公司川中油气矿，四川 遂宁 629000

针对碳酸盐岩气藏试采期开发技术对策研究中存在的问题，在剖析裂缝表征方法和扩展气井产能概念的基础上，探索和揭示了不同类型储层裂缝特征相对应的气井产能变化规律，形成了碳酸盐岩储层裂缝表征与产能描述技术。文中研究明确了裂缝￣孔洞型、裂缝￣孔隙型和孔隙型3类储层酸压改造后形成的裂缝搭配模式与试井双对数曲线的对应关系；通过建立复合地层渗流方程，实现了对气井产能以及影响产能的动态储量、平均渗透率的描述，揭示了纯气井和气水同产井在早期、过渡期、平稳期和变化期4个阶段的产能变化规律，以此为依据提出了井位平面部署、靶体位置优化、钻井及储层改造工艺、生产井制度优化4个方面的对策建议。通过实施开发技术对策，取得了单井产量的突破，生产井水侵速度得到一定程度的控制。文中研究成果指导了气藏开发技术对策的制定，为同类型碳酸盐岩气藏的高效勘探开发提供了技术参考。

Aiming at the technical countermeasures for the development of carbonate gas reservoir during the trial production period, on the basis of analysing the fracture characterization method and expanding the concept of gas well productivity, the gas well productivity change law corresponding to the fracture characteristics of different reservoirs is explored and revealed, and the fracture characterization and productivity description technology based on carbonate reservoir is developed. The corresponding relationship between the fracture matching mode formed after acid fracturing and the double logarithmic curve of well testing is clarified in three types of reservoirs, namely fracture-vug type, fracture-pore type and pore type. Through the composite formation seepage equation, the gas well productivity and the dynamic reserves and average permeability that affect productivity are described, and the productivity change laws of pure gas wells and gas water co-production wells in the early period, transition period, stable period and change period are revealed. Based on this, the paper puts forward countermeasures and suggestions in four aspects: well location plane deployment, target location optimization, drilling and reservoir reconstruction technology, and production well system optimization. A breakthrough in single well production is achieved through the implementation of development technical countermeasures, and the water invasion speed of production well is controlled to a certain extent. The research results in this paper guide the formulation of development technical countermeasures for gas reservoir, and provide technical reference for the efficient exploration and development of the same type of carbonate gas reservoirs.

10.6056/dkyqt202301017