梁751区块优快钻井技术研究与应用

康厂 王伟

摘 要：梁751区块目的层为沙四上纯下亚段、完钻层位纯下亚段，平均设计井深为3 600 m，井眼轨迹采用三段制设计，稳斜段长达1 400 m，施工难度较大。同时，本区块地层为高压低渗，临井施工过程中发生盐水侵、油气侵等复杂情况，固井质量难以有效保证。针对以上情况，通过优化轨迹设计，细化钻井液施工方案，优选钻具组合及钻进参数，达到了提速提效的目的，同时有效地保证了固井质量，为后期压裂投产施工打下良好的基础。

关键词：高压低渗;井眼轨迹;钻具组合;钻进参数;优快钻井

中图分类号：TE243文献标识码：A文章编号：1003-5168（2020）17-0123-04

Research and Application on High Quality and Fast Drilling Techniques of Liang-751 Block

KANG Chang1 WANG Wei2

（1. Shengli Oil Field New Energy Development Center，Dongying Shandong 257000;2 Shengli Oil Field Petroleum Engineering Supervision Center，Dongying Shandong 257055）

Abstract： The target formation in liang-751 block is the upper pure lower sub-member of ES4 and the lower pure sub-member of drilling horizon， the average designed well depth is 3 600 m， the trajectory of the wellbore adopts a three-stage design， the stable inclined section is 1 400 m long， the construction is more difficult. At the same time， the formation of this block is high pressure and low permeability， salt water invasion and oil and gas invasion occur in the process of adjacent well construction， so the cementing quality is difficult to guarantee. In view of the above situation， through optimizing trajectory design， refining drilling fluid construction scheme， optimizing Bha and drilling parameters， the goal of increasing speed and efficiency is achieved and the cementing quality is effectively guaranteed， it lays a good foundation for later stage fracturing operation.

Keywords： high pressure and low permeability;well trajectory;Bha;drilling parameters;fast drilling

梁751區块位于济阳坳陷东营凹陷利津洼陷西南坡南端梁751块，本区块钻遇地层自上而下依次为：第四系平原组;上第三系明化镇组、馆陶组;下第三系东营组、沙河街组（沙一段至沙四段），梁751区块油藏类型为受构造控制的特低渗透岩性油藏，原始地层压力46.56 MPa。由于本区块布井为丛式井组，井深达到3 600 m，井眼轨迹设计稳斜段较长，同时本区块钻进过程中发生过油气侵和盐水侵等复杂情况[1-3]，给钻井施工带来很大的挑战，固井质量难以保证。

1 井眼轨迹控制难点分析与优化方案

1.1 设计概况

梁751区块位于济阳坳陷东营凹陷利津洼陷西南坡南端梁751块，本区块目的层为沙四上纯下亚段、完钻层位纯下亚段，钻探目的是开发梁751井区沙四段特低渗透岩性油藏。自上而下来看，本区块钻遇地层依次为：第四系平原组;上第三系明化镇组、馆陶组;下第三系东营组、沙河街组（沙一段至沙四上）地层。……