水平对接采卤井腔体溶蚀形态分析

Morphological Analysis of Cavern Leaching of Horizontally Butted Wells

周冬林 焦雨佳 杜玉洁 王立东

ZHOU Donglin JIAO Yujia DU Yujie WANG Lidong

中国石油天然气股份有限公司盐穴储气库技术研究中心, 江苏 镇江 212000

Salt Cavern of Gas Storage Technology Research Institute, PetroChina, Zhenjiang, Jiangsu 212000, China

水平对接采卤井腔体的形态无法被现有声呐检测设备直接探测，腔体形态不明是制约这类腔体改造利用的主要因素。针对这一问题，采用声呐检测技术和造腔工程技术，结合采卤井钻井工程资料、生产资料和盐层不溶物含量等资料，计算了腔体的底坑体积，构建了水平对接井腔体的整体形态。结果表明，水平对接井腔体的溶蚀主要发生在两口井的井眼附近，形成两个类似于单井溶蚀的腔体，自由体积仅存于两口井附近，两口井之间连通部位仅有一个狭长的通道连接，腔体大部分被不溶物掩埋，整体形态呈U形。研究结果可以指导水平对接井采卤腔体的稳定性评价和改造利用方案设计，有效推动这类腔体的储气库改造利用。

The shape of cavern leaching by horizontally directional butted wells can't be directly detected by the sonar detection equipment in service, and the unawareness of the shape is the main factor restricting the transformation and utilization of this kind of caverns. In order to solve this problem, sonar detection technology and leaching engineering technology are used, combined with the data of well drilling engineering, production data and salt layer insoluble content, the pit volume of the cavern is calculated, and the overall shape of cavern is constructed. The results show that the dissolution of horizontal directional butted wells mainly occurs in the vicinity of two wells, forming two cavities similar to single well dissolution. The free volume only exists near the two wells. There is only a narrow channel connecting the two wells. Most of the space are buried by insoluble substances, and the overall shape is U-shaped. The research results can guide the stability evaluation of cavern in horizontally directional butted wells and the design of transformation and utilization scheme, and effectively promote the transformation and utilization of this kind of cavern.

10.11885/j.issn.1674-5086.2019.05.20.01