超重质原油井下密闭取样工艺研究及其在塔河油田的应用

Extra-hoil underground sampling technique and its application in Tahe Oil Field

张梦华 刘练 王志敏 赵刚 王超 邹伟 夏福良 田峰

Zhang Menghua Liu Lian Wang Zhimin Zhao Gang Wang Chao Zou Wei Xia Fuliang Tian Feng

中国石化 西北油田分公司 完井测试管理中心,新疆 轮台 841600

Well Completion Test Management Center,SINOPEC Northwest Company,Urumqi,Xinjiang 830010,China

塔河油田12区奥陶系油藏原油密度大,属于超重质原油;原油动力粘度高,流动性能极差;地层压力高、地层温度高;主要采用掺稀生产,掺稀点深度一般为5500m 左右。通过超重质原油井下密闭取样工艺的研究,对改进高压物性取样器、研制加热转样装置、优化取样工艺,首次成功于5950m 取得合格的高压物性样品,首次成功转样并成功进行高压物性分析,创造了高压物性取样点压力最高、粘度最高、温度最高、深度最大4项国内纪录,形成了一整套超重质原油井下密闭取样工艺技术。

Crude oil from the Ordovician reservoir in block no.12 of the Tahe Oil Field belongs to extra-heavy oil due to high density.The crude oil has strong viscosity and seldom flows.Formation pressureand temperature are both high.In production,light oil is mixed in,and the mixing depth is about 5 500m.Extra-heavy oil underground sampling technique was optimized.PVT sampler was improved.Sam-ple heat and transfer device was designed.Qualified PVT sample was made 5 950 m deep for the firsttime,and then transferred and analyzed successfully.4 national records were made:highest samplingpYeSSUYe,blggeSt VISCOSIty,highest temperature,and deepest depth.A set of extra-heavy oil under-ground sampling technique was concluded.

https://doi.org/10.11781/sysydz2011S1170