鄂尔多斯盆地致密油水平井体积压裂改造实践与认识——以定边油田致密油为例  

Practice and understanding of volume fracturing in tight oil horizontal wells in ordos basin——Taking tight oil in Dingbian oilfield as an example

作　　者：李鹏程[1] 张煜培[2] 章倩倩 高婧 杨亮[1] 梁秋月 LI Peng-cheng;ZHANG Yu-pei;ZHANG Qian-qian;GAO Jing;YANG Liang;LIANG Qiu-yue(Dingbian Oil Production Plant,Yanchang Oilfield Company Limited,Dingbian,Shaanxi 718600;Exploration and Development Technology Research Center,Yanchang Oilfield Company Limited,Yan'an,Shaanxi 716000)

机构地区：[1]延长油田股份有限公司定边采油厂,陕西定边718600 [2]延长油田股份有限公司勘探开发技术研究中心,陕西延安716000

出　　处：《地下水》2023年第4期168-170,共3页Ground water

基　　金：国家科技重大专项(2017ZX05005002-004)。

摘　　要：定边油田致密油主要发育于半深湖-深湖相区,最典型是延长组长7油层,烃源岩条件优越。致密油分布范围广,同时砂岩储层致密、物性差、孔隙结构复杂、含油饱和度高、油藏压力系数低的特点。另外微裂缝较为发育。开发历程经历了三个阶段:致密油开发试验阶段、致密油开发推广阶段、致密油开发综合治理阶段。本文总结分析了致密油勘探开发过程,且从工程参数特征等因素进行差异性分析,找出影响致密油开发效果的主控因素,在此基础上不断的技术攻关,深化完善工艺参数,配套形成了致密油储层改造技术系列,并实现规模化应用。因此,根据目前的储层特征和开采现状,积极的转换开发方式,注水吞吐、体积压裂、与井网结合的缝控体积压裂取得很好效果,是致密油提高采收率的经济有效手段,形成了致密油不同井况、不同井组的增产技术思路,这几种方式措施后的水平井均取得一定成效,对致密油藏水平井开发提供了指导性的意义。The tight oil in Dingbian oilfield is mainly developed in the semi deep lake deep lake phase area,the most typical is Chang 7 reservoir,and the source rock conditions are superior.At the same time,sandstone reservoir is characterized by tight,poor physical properties,complex pore structure,high oil saturation and low reservoir pressure coefficient.In addition,microcracks are relatively developed.The development process has experienced three stages:tight oildevelopment test stage,tight oil development promotion stage and tight oil development comprehensive treatment stage.This paper summarizes and analyzes the exploration and development process of tight oil,and analyzes the differences from the factors such as the characteristics of engineering parameters to find out the main control factors that affect the development effect of tight oil.On this basis,the continuous technical breakthrough,deepening and improving the process parameters,forming a series of tight oil reservoir transformation technologies,and realizing large-scale application.Therefore,according to the current reservoir characteristics and mining status,actively changing the development mode,water injection huff and puff,volume fracturing,and fracture controlled volume fracturing combined with well pattern have achieved good results.It is an economic and effective means to enhance oil recovery of tight oil,forming the stimulation technology ideas of different well conditions and different well groups of tight oil,and the horizontal wells after these measures have achieved certain results It provides guidance for the development of horizontal wells in tight reservoirs.

关 键 词：定边油田 致密油 体积压裂 提高采收率 

分 类 号：TE355.6[石油与天然气工程—油气田开发工程]