沁水盆地寿阳区块和柿庄区块煤层气开发条件对比

发布时间：2018-03-28 15:38

  本文选题：寿阳区块　切入点：柿庄区块　出处：《煤田地质与勘探》2017年04期

【摘要】：基于沁水盆地寿阳和柿庄区块的地质和排采资料,从主采煤储层的资源性、储层流体可动性、压裂工程条件开展2个区块的对比分析,讨论寿阳区块煤层气开发的关键问题,提出下一步开发对策。结果表明:柿庄区块各煤层的资源性和流体可动性较好,具备单层排采的条件,而寿阳区块主力煤层的累计资源丰度高达1.57×10~8 m~3/km~2,解吸潜力大,3套煤层的有效解吸量均为9 m~3/t左右,流体可动性强,渗透率平均7.57×10~( 3)μm~2,吸附时间大于15 d,具备多层合采的条件;与柿庄区块相比,寿阳区块煤系中砂体发育广泛,煤系外源水供给能力更强,且实际压裂规模更大,断裂和压裂缝沟通含水层造成煤层气井高产水的风险更大。建议寿阳区块坚持以合层排采为主,在井层优选时,首先应规避断裂,其次应考虑目标煤层顶底板的岩性组合,同时要注意优化和控制压裂规模。
[Abstract]:Based on the geological and production data of Shouyang and Shizhuang blocks in Qinshui Basin, this paper discusses the key problems of coalbed methane development in Shouyang block, based on the comparative analysis of the resources of the main coal mining reservoir, the fluid mobility of the reservoir, and the fracturing engineering conditions. The results show that the coal seams in Shizhuang block have better resourcefulness and fluid mobility, and have the condition of single-layer drainage. The accumulative resource abundance of the main seams in Shouyang block is as high as 1.57 脳 10 ~ (-8) m ~ (-1) ~ (3) 路m ~ (-2), and the effective desorption capacity of the three sets of coal seams is about 9 m ~ (3 / t), with a permeability of 7.57 脳 10 ~ (3) 渭 m ~ (2) 渭 m ~ (2) and adsorption time of more than 15 days. Compared with Shizhuang block, the sand body of coal measure in Shouyang block has a wide range of development, the external water supply capacity of coal measure is stronger, and the scale of actual fracturing is larger. The risk of high yield water in coalbed methane wells caused by the communication of fault and pressure fracture aquifer is greater. It is suggested that the Shouyang block should adhere to the combination of combined strata to discharge production, to avoid fracture first and to consider the lithologic combination of the top and bottom plates of the target coal seam in the optimum selection of well layers. At the same time, attention should be paid to optimizing and controlling fracturing scale.
【作者单位】： 中国石油大学(北京)地球科学学院;油气资源与探测国家重点实验室;中海石油(中国)有限公司非常规油气分公司;中联煤层气有限责任公司;
【基金】：国家科技重大专项项目(2011ZX05042)~~
【分类号】：TE37
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本文编号：1676940