苏里格气田水平井开发技术

苏里格气田属典型的“三低”气田，主要目的层属冲积平原背景下辫状河沉积体系，叠置砂体具有明显的方向性，气藏规模小，砂体展布范围有限，有效砂体连通性差，储层非均质性强，采用常规井开发难以提高单井产量。水平井开发作为提高单井产量及采收率的重要手段已在苏里格气田得到推广应用，但如何确保水平井顺利实施、提高储层钻遇率和实施效果已成为水平井开发的技术难点。为此，以苏6、苏36-11区块所实施水平井为例，系统梳理了近年来水平井实施过程中出现的各类复杂问题，通过对水平井实施情况进行分析，结合气田基本地质特征，分别从水平井选井、水平井入靶、水平段地质导向等关键环节入手，总结出了适合苏里格气田水平井开发相关配套技术。通过现场应用，其效果明显，对类似地区的水平井施工也具有一定指导作用。

Horizontal well technology for the development of the Sulige Gas Field

The Sulige Gas Field is typically characterized by low formation pressure, low gas abundance, and low per-well productivity, and its pay zones are strata of braided river facies deposited in the alluvial plain, where the overlapped sandbodies present an obvious direction but are distributed in a limited range, and poor connectivity is found between effective sandbodies, and small-scale gas reservoirs have strong heterogeneity. That is why it is difficult to raise the per-well production by the conventional ...