大口径绳索取心钻进工艺在页岩气地质调查川蔺参1井中的应用

Application of large diameter wire-line core-drillng technology in Chuanlincan-1 well for shale gas geological survey

摘要:

为了获取参数井压裂设计的相关参数，需要对井眼进行阵列声波测井和微侧向电阻率测井，需要采取大直径岩心进行力学实验。采用固体岩心钻探取心工艺，钻孔口径难以达到物探测井仪器入井要求，岩心直径也不能满足实验要求，必须采用大口径取心工艺才能满足设计要求。同时，常规取心工艺难以满足页岩气勘探对岩心（页岩或者煤心）提升时间的要求，绳索取心工艺在这方面优势明显。本篇介绍了大口径绳索取心工艺在页岩气地质调查井川蔺参1井的成功应用，根据大口径绳索取心钻具的结构特点，结合目的层岩性特征，总结了合理的取心钻进工艺参数和技术保障措施，取得了较好的效果。

Abstract:

In order to obtain the fracturing design parameters of the parametric well， it is necessary to perform array acoustic logging and micro-lateral resistivity logging， and obtain large diameter cores for mechanical test. With solid core drilling and coring technology， the borehole diameter can not meet the requirements of running geophysical logging tools， and the core diameter can not meet the experimental requirements， too. As a result， large diameter coring technology needs to be adopted to meet the design requirements. Meanwhile， the conventional coring process can not meet the requirement of shale gas exploration on the core （shale or coal core） retrieving time； but the wireline coring process has obvious advantages in this respect. This paper introduces the successful application of large diameter wireline coring technology in Chuanlincan-1. According to the structural characteristics of the large diameter wireline coring tool and the lithological characteristics of the target formation， the proper technological parameters and technical guarantee measures for coring drilling are summarized， and good results are achieved.