摘要
为了充分利用已探明的优质盐矿资源建设盐穴储气库,尽量避免盐层中厚夹层对造腔的影响,需要开展厚夹层盐层条件下的造腔工艺研究。通过造腔试验,明确了厚夹层在造腔过程中是可以垮塌的,其下部盐岩可以造腔。基于盐层地质特征和中国同类项目造腔实践经验,将淮安储气库腔体的理想形态设计为顶底近似为圆锥体、主体为圆台,最大直径位于圆台底部。基于钻井资料,设计了造腔工艺方案并进行数值模拟,思路如下:首先采用正循环方式在厚夹层下部盐岩造腔,然后调整造腔管柱,在厚夹层上下同时造腔,促使厚夹层垮塌;进入造腔中后期,改为反循环造腔,可加快造腔进度。数值模拟与实际应用表明该造腔工艺方案可充分利用造腔段的盐岩,该设计思路可为造腔过程中厚夹层的处理工艺提供借鉴。
For the full use of proven high-quality salt resources to build salt cavern gas storage and minimizing the impact of thick interlayer in salt beds on solution mining,it is required to carry out research on solution mining technology under the condition of thick interlayer salt beds.It can be clearly learnt from the cavern building test that,the thick interlayer is likely to collapse during the solution mining process,and the lower salt rock is considered to be capable of cavern building.Based on the geological characteristics of salt beds and the practical experience of cavern building in similar projects in China,the cavity of Huai’an gas storage should be designed in a desirable shape with the top and bottom as an approximately cone and the main body as frustum of a cone with the maximum diameter located at the bottom of frustum of a cone.Based on the drilling data,the cavern building plan was designed and numerically simulated.The idea is as follows:firstly,a positive circulation method should be adopted for cavern building in the salt rock at the lower part of the thick interlayer,and then the cavern building string should be adjusted to simultaneously build the cavern at the upper and lower part of the thick interlayer for accelerating the collapse of the thick interlayer.In the middle and late stage of cavern building,the reverse circulation cavern building method should be adopted to speed up the progress of cavern building.The numerical simulation and practical application show that the solution mining technology could take full advantage of salt rocks in the cavern building areas.The design idea is expected to provide a reference for the treatment of medium and thick interlayer in the cavern building process.
作者
齐得山
李建君
巴金红
王元刚
敖海兵
李淑平
王文权
QI Deshan;LI Jianjun;BA Jinhong;WANG Yuangang;AO Haibing;LI Shuping;WANG Wenquan(Gas Storage Project Department,PetroChina West East Gas Pipeline Company)
出处
《油气储运》
CAS
北大核心
2020年第8期947-952,共6页
Oil & Gas Storage and Transportation
基金
中石油储气库重大专项“地下储气库关键技术研究与应用”子课题“盐穴储气库加快建产工程试验研究”,2015E-4008。
关键词
盐穴储气库
造腔工艺
厚夹层
腔体形态
盐岩
salt cavern gas storage
solution mining technology
thick interlayer
cavity shape
salt rock
