三塘湖油田条湖组致密油水平井优化设计与应用

Optimized Design of Horizontal Well and Its Application in Tight Reservoirs in Tiaohu Formation of Santanghu Oilfield

三塘湖油田条湖组致密油藏为吐哈油田三塘湖盆地近年来发现的储量千万吨级非常规油藏,以"水平井+大型体积压裂"方式规模开发。受古构造背景和火山活动影响,储层展布多呈团块状,外围延展性差,加上微构造变化剧烈、区块井控程度低,给水平井设计和施工带来很大挑战。利用油层追踪并融合甜点预测技术优化井位;利用数模、油藏工程方法优化水平井参数;利用地层倾角属性开展构造精细研究。采用多靶点、宽靶框、全脱靶模式优化水平段轨迹设计,并根据现场钻井动态实时调整钻进轨迹。从钻遇油层和投产情况看,取得了良好的效果,初步形成了致密油储量有效开发动用的技术模式。

Basin with ten million tons reserves and it was developed with horizontal wells and massive hydraulic fracturing.In view of the affection of palaeostructure and volcanic action,the reservoir distribution was massive form and its extensibility was poor peripherally,also the microtectonic variance was serious and well control extent was low,and these brought challenges to the design and operation of horizontal wells.The techniques of oil layer tracing and sweets forecasting were used to optimize well locations,the methods of numerical simulation and reservoir engineering were used to optimize horizontal well parameter,formation dipangle attribute was used to carry out the fine research of structures,and multitarget points and wide-target area and holo-missing target pattern wee used to optimize the design of horizontal well trajectory.Based on the field drilling performance,the drilling trajectory is timeliness adjusted.Seeing from the situations of drilling and production,good results are obtained,the technical patterns are initially created for effectively producing the reservoirs.