从Haynesville 页岩气开发数据研究高压页岩气高产因素

Study on high production factors of high-pressure shale gas from Haynesville Shale Gas development data

房大志 曾辉 王宁 张勇

FANG Dazhi ZENG Hui WANG Ning ZHANG Yong

中国石化华东分公司石油勘探开发研究院，江苏南京　210011 中国石化华东分公司物探研究院，江苏南京　210011

Petroleum Exploration and Production Research Institute, Huadong Branch Company, SINOPEC, Nanjing 210011, China Geophysical Prospecting Research Institute, Huadong Branch Company, SINOPEC, Nanjing 210011, China

Haynesville 页岩气井实际生产数据表明，影响气井产量的3 大主导因素是地质甜点区、压裂参数、合理排采。储层厚度50~60 m、总有机碳（TOC）含量3%、孔隙度4%、压力系数2.0、脆性矿物含量60%，是选择页岩甜点区的关键因素。水平段长一般1 000~1 500 m、分段数9~12 段、单段长90~110 m、簇间距20~25 m、施工排量11~13 m3/min，单段液量大于1 500 m3、单段加砂量大于120 t 是高产水平井储层压裂参数。初期保持较小生产压差有利于保持渗流能力进而获得最大累积产量。建议我国借鉴北美类似经验，并根据不同区块页岩地质特征优化压裂参数，实现页岩气经济高效开发。

The actual production data from Haynesville Shale gas wells show that, the three leading factors affecting production are geologic sweet spot area, fracture parameters and proper drainage. The key factors for sweet spot areas selection in shale include reservoir thickness (50 to 60 m), total organic carbon (TOC) (3%), porosity (4%), pressure coefficient (2.0), and the content of brittle minerals (60%). The fracturing parameters for reservoirs with high-production horizontal wells are: the length of horizontal section being generally 1 000 m to 1 500 m; stages being in 9 to 12; the length of single stage being 90 m to 110 m; cluster spacing being 20 to 25 m; construction displacement being 11 to 13 m3/min; fluid volume for single stage being greater than 1 500 m3; and sand volume for single stage being greater than 120 t. Maintaining a small initial production pressure differential helps maintain the seepage capacity, and hence obtain the maximum cumulative production. It is recommended that using the similar experiences from North America for reference, optimizing the fracturing parameters according to geologic features of shales in different blocks, and realizing economic and efficient development of shale gas.

10.13639/j.odpt.2015.02.016