鄂西地区颚鹤页3井钻探施工技术

Drilling and construction technology of Well Eheye 3 in the western Hubei

摘要:

页岩气参数井颚鹤页3井位于湖北恩施湘鄂西褶皱带宜都-鹤峰复背斜鹤峰向斜，钻探的主要目的是主探二叠系大隆组台盆相沉积页岩气，兼探栖霞组混积陆棚相沉积页岩气，设计井深2300 m，完钻井深2326 m。本文介绍了颚鹤页3井的钻探施工情况，针对地表浅层嘉陵江组的失返性漏失处理，防斜打直弯壳体螺杆钻具组合设计，孤峰组和茅口组高硬度硅质灰岩钻头选型等方面开展研究，提高了钻进效率，完成了中国地质调查局自主组建钻井队伍实施的第一口页岩气参数井，获取了目的层岩心实物资料，实现了鄂西地区二叠系大隆组页岩气、栖霞组油气调查新发现，拓展了鄂西地区二叠系页岩气勘探新区和新层系，对鄂西地区页岩气调查评价与开发提供了重要技术支撑。

Abstract:

The shale gas parameter Well Eheye 3 is located in the Yidu-Hefeng complex anticline and Hefeng syncline of the Enshi Xiang’exi Fold Belt in Hubei Province. The main purpose of drilling is to explore the sedimentary shale gas of the Permian Dalong Formation platform basin facies， as well as the mixed shelf sedimentary shale gas of the Qixia Formation. The designed well depth is 2300m， and the completed drilling depth is 2326m. This article introduces the drilling and construction situation of Eheye 3 well， focusing on the treatment of non return leakage in the shallow Jialingjiang Formation on the surface， the selection of high hardness siliceous limestone drill bits for the Gufeng and Maokou formations， and the design of anti inclination straight bending shell screw drilling tool combinations. Research has been carried out to improve drilling efficiency. The first shale gas parameter well independently established by the China Geological Survey has been completed， and physical data of target layer rock cores have been obtained. New discoveries have been made in the exploration of Permian Dalong Formation shale gas and Qixia Formation oil and gas in western Hubei， expanding the exploration area and new layers of Permian shale gas in western Hubei. The investigation and evaluation of shale gas in western Hubei have been conducted. Provided important technical support for development.