风城浅层超稠油油藏原位催化改质降黏技术  

In-situ catalytic modification and viscosity reduction technology in shallow ultra-heavy oil reservoirs in Fengcheng

作　　者：吕柏林[1] 马鹏[2] 卢迎波[2] 胡鹏程[2] 王瑞[2] LYU Bailin;MA Peng;LU Yingbo;HU Pengcheng;WANG Rui(PetroChina Research Institute of Exploration and Development,Beijing 100083,China;PetroChina Xinjiang Oilfield Company,Karamay 834003,Xinjiang,China)

机构地区：[1]中国石油天然气集团公司勘探开发研究院,北京市100083 [2]中国石油天然气集团公司新疆油田分公司,新疆克拉玛依市834003

出　　处：《石油钻采工艺》2023年第5期632-637,共6页Oil Drilling & Production Technology

基　　金：中国石油重大专项“高黏原油地下原位改质技术”(编号:2016A-0901);中石油股份公司重大专项“未动用稠油开采新技术研究”(编号:2019B-1411)。

摘　　要：针对风城浅层超稠油油藏蒸汽吞吐中后期采用微生物、水热催化、气体辅助等降黏方式开采效果均不佳的问题,进行了超稠油催化改质降黏技术研究。通过催化裂解实验分析了风城油田重18井区油样在4.5 MPa、100~220℃条件下使用催化剂和供氢剂后的降黏效果,采用双管并联驱油实验得到了催化改质剂辅助蒸汽驱油效果及原油组分变化。结果表明:220℃时,单独使用催化剂降黏率可达50%,加供氢剂后降黏率可达90%以上;催化改质剂辅助蒸汽驱后原油降黏率可达88.5%,采出油中C_(25)以上组分含量由54.4%降至37%,原油轻质化明显。对1口低产蒸汽吞吐井开展现场试验,实施后周期产油增加387 t,油汽比提高了0.34,取得较好的应用效果。研究表明,原位催化改质降黏技术可促使原油发生不可逆降黏,可大幅度降低稠油黏度,提高开发效果,建议进一步推广应用。In response to the less-than-satisfactory results of microbial,hydrothermal catalysis and gas-assisted viscosity reduction methods during the mid-to-late stages of production in shallow ultra-heavy oil reservoirs in Fengcheng,a study on the technology of catalytic modification and viscosity reduction for ultra-heavy oil was conducted.Using oil samples from wellblock Chong-18 in Fengcheng Oilfield,the viscosity reduction effect of catalyst and hydrogen supplier at 4.5 MPa and 100-220℃ was analyzed through catalytic cracking experiments.Additionally,the effect of catalytic modification agents on steam-assisted displacement and the changes in crude oil composition were analyzed by using a dual-tube parallel oil displacement experiment.The results show that the viscosity reduction rate using the catalyst alone could reach 50%,while exceed 90%when combined with a hydrogen supplier,at 220℃.In the single-tube steam flooding experiment,the viscosity reduction rate reached 88%,and the content of components above C_(25) in the produced oil decreased from 54.4%to 37%,indicating significant lightening of the crude oil.A field test was performed in a low-production huff and puff well.After treatment,the periodic oil production increased by 387 t,and the oil-togas ratio increased by 0.34,showing sound field application results.The study suggests that in-situ catalytic modification and viscosity reduction technology can induce irreversible viscosity reduction in crude oil,significantly lowering the viscosity of heavy oil and improving development efficiency,which can be further promoted and applied.

关 键 词：超稠油 蒸汽吞吐 催化改质 降黏 提高采收率 

分 类 号：TE357[石油与天然气工程—油气田开发工程] TE345