陆相页岩气测井评价方法

Effective Logging Evaluation Methods of Continental Shale Gas

为解决我国在陆相页岩气测井评价领域技术储备薄弱的问题,依据陆相页岩气评价标准,在总结陆相页岩气测井评价方法的基础上,结合延长陆相页岩气示范区长7页岩气勘探开发实践情况,提出一套适合中国陆相页岩气测井评价的方法和有效途径。该有效途径为:(1)筛选TOC>2.0%的层段;(2)选定孔隙度>2.0%的层段;(3)筛选含气量>1.0m^3/t的层段;(4)圈定单井累计厚度>30m的井和井区;(5)筛选脆性指数>40.0%的井区作为优先施工区域。该测井评价方法综合了多种储层敏感参数,提高了储层评价的精度和效率,并在延长陆相页岩气勘探实践中取得了良好效果。最后,文章指出目前陆相页岩气测井技术存在的问题和未来的突破方向和思路,对指导陆相页岩气勘探和经济评价具有重要意义。

In order to solve the problem of weak reserve in continental shale gas logging evaluation in our country,according to continental shale gas evaluation criteria,on the basis of summarizing the continental shale gas logging evaluationmethods and combining with chang7shale gas exploration and development practice in Yanchang shale gasdemonstration zone,an effective logging evaluation process suitable for China’s continental shale gas has been proposed:QPicking out the layer sections which T O C2.0%;②Layer porosity>2.0%was selected;?Picking out the layer sections which gas content^l.0m3/t;④Total thickness>30m of single well and well area is delineated;⑤finally,select the brittleness index〉40.0%well area as a priority of the development area.The log evaluation method combined a variety of reservoir sensitivity parameters,improved the accuracy and efficiency of reservoir evaluation,and achieved good effect in continental shale gas exploration in Yanchang shale gas demonstration zone.八t last,the paper pointed out the problems existing in the continental shale gas logging technology and the direction o future breakthrough,that was of great significance to guide the exploration and economic evaluation of continental shale gas.