页岩油水平井立体开发井组设计探索

Exploration on well group design for three-dimensional development of shale oil horizontal wells

摘要:

当前国内页岩油立体开发仍处于探索阶段，为构建钻井、压裂、投产一体化高效建产模式，需开展井组轨道设计与作业时序的协同优化。本文以济阳坳陷民丰洼陷某实际井台为研究载体，针对“纵向横推Tank”与“横向纵推Tank”2种运行模式，采用最近距离法结合Landmark软件，系统分析造斜点位置、造斜点相对深浅、入靶前造斜率对碰撞风险的影响，并提出针对性防碰措施。研究表明，“纵向横推”模式通过轨道平面错开设计，整体碰撞风险较低，适应性更强；而“横向纵推”模式因轨道交叉较多，防碰设计更为复杂，需依靠造斜点双重错开优化以降低风险。研究成果为页岩油立体开发井组设计提供了可行的技术支撑，为后续不同建产模式下的井组优化提供了经验借鉴。

Abstract:

Currently， the three-dimensional development of shale oil in China is still in the exploration stage. To construct an integrated and efficient production model of drilling， fracturing， and commissioning， it is necessary to carry out collaborative optimization of well group trajectory design and operation sequence. Taking an actual well pad in Minfeng Sag of Jiyang Depression as the research carrier， this paper focuses on two operating modes， namely "Vertical-Horizontal Push Tank" and "Horizontal-Vertical Push Tank". The closest approach method combined with Landmark software is adopted to systematically analyze the impacts of the position of kickoff points， the relative depth of kickoff points， and the build rate before target entry on collision risk， and targeted anti-collision measures are proposed. The research shows that the "Vertical-Horizontal Push" mode has lower overall collision risk and stronger adaptability through the design of trajectory plane staggering； while the "Horizontal-Vertical Push" mode has more complex anti-collision design and higher risk due to multiple trajectory crossings， and it is necessary to rely on the dual staggering optimization of kickoff points to reduce risks. The research results provide feasible technical support for the well group design of shale oil three-dimensional development and provide a reference for the well group optimization under different production models in the future.