安塞特低渗油田注水开发后裂缝动态表征及其影响  

Dynamic characterization and its impact of fissures after waterflooding in extra-low permeability Ansai Oilfield

作　　者：张欢[1] 王波[2] 王兴[1] 段明霞[3] 黎桉安[3] 

机构地区：[1]中国石油长庆油田分公司第一采油厂 [2]中国石油长庆油田分公司第七采油厂 [3]中国石油长庆油田分公司第二采气厂

出　　处：《低渗透油气田》2015年第1期83-86,共4页

基　　金：基金项目：国家重大专项“低渗透油藏中高含水期稳产配套技术”（编号：2011ZX05013-005）.

摘　　要：安塞油田长6层天然微裂缝发育，原始状态下是闭合的，在注水或压裂后，地层受力，会产生人工裂缝。受地应力控制，人工裂缝主方向单一，注水开发后裂缝的长度呈动态变化，且具有规律性，对油田开发有着重要的影响，研究裂缝动态变化特征对油田开发技术政策调整具有重要的意义。通过试井资料分析计算出注水诱导缝延伸速度和采油井压裂缝闭合速度，并阐述了裂缝的动态变化对井网部署和单井产量的影响。认为井网与裂缝进行匹配优化，可以最大限度地发挥油藏潜力。周期性重复压裂采油井，可以增加裂缝长度，提高单井产量，改善开发效果。Ansai Oilfield Chang6 layer of natural micro-fractures, in its original state is closed, the water or fracturing, the formation force, will pro- duce artificial cracks. Subject to stress control, the main direction of a single artificial crack, crack length after waterflooding showed a dynamic change, and has regularity, has an important impact on the oilfield development. Research fissure dynamic characteristics is of great significance for the development of technology policy adjustments oilfield. This paper analyzes the calculated injection induced joint production wells extend the speed and the speed of fracture closure pressure, and explains the dynamic change of the crack network deployment and well production wells affected by the well test data. Well consider matching network and optimize the cracks, can maximize the potential of the reservoir. Periodically repeated fractur- ing production wells can increase fracture length, increase well production and improve performance.

关 键 词：安塞油田:注水诱导缝 压裂缝 延伸速度 闭合速度 

分 类 号：TE341[石油与天然气工程—油气田开发工程]