Extra-hoil underground sampling technique and its application in Tahe Oil Field
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摘要: 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。Abstract: 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.
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Key words:
- enclosed sampling /
- extra-heavy crude oil /
- PUT analySIS /
- Tahe Oil Field
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