贵州岑巩TX1井牛蹄塘组页岩压裂效果评价

发布时间：2018-05-26 19:18

本文选题：TX井 + 牛蹄塘组　；参考：《地球科学》2017年07期

【摘要】：TX1井是四川盆地外围第一口针对牛蹄塘组页岩压裂的井,岩心现场解析含气量为1.00~3.06m~3/t,含气性较好,展现了较好的勘探前景.但复杂构造以及下部含水层对后期储层改造提供了挑战.对TX1井进行了压裂改造,返排过程中气体点火2~3m,但后期一直出水,返排率大于100%.利用Meyer软件进行压裂拟合评价,结果显示TX1井在压裂过程中因沟通了底部高含水层,导致压后出水严重;压裂改造未形成复杂的裂缝网络,限制了储层改造的效果.因此认为直井压裂改造受体积的限制,只能作为对页岩储层含气性与产能的评价手段,页岩气商业性开发还需通过水平井钻井和大规模的分段压裂改造来实现.该井的钻探施工与压裂改造经验为本地区下一步勘探开发指明了方向.
[Abstract]:Well TX1 is the first well on the shale fracturing in the periphery of the Sichuan basin. The core site has a high gas content of 1.00~3.06m~3/t and good gas content, which shows a good prospect for exploration. However, the complex structure and the lower aquifer provide a challenge for the later reservoir reconstruction. The fracturing of the TX1 well and the gas ignition 2~3 in the process of back discharge are made. M, but in the later period, the discharge rate is more than 100%., the rate of return row is greater than that of the fracture fitting evaluation using Meyer software. The result shows that the TX1 well has a high water bearing layer in the bottom of the fracturing process, which leads to serious water after fracturing, and the fracturing transformation does not form a complex fracture network, which restricts the effect of the reservoir reconstruction. Therefore, it is considered that the fracture reconstruction of the straight well is limited to the volume limit. The system can only be used to evaluate the gas and productivity of shale reservoirs, and the commercial exploitation of shale gas should be realized through horizontal well drilling and large-scale fractured reconstruction. The drilling construction and fracturing experience of this well indicate the direction of the next exploration and development in the region.
【作者单位】：中国地质调查局油气资源调查中心;中国国储能源化工集团股份公司;铜仁中能天然气有限公司;
【基金】：中国地质调查局项目(No.12120114054101)
【分类号】：TE377

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