摘要
多元热流体技术是海上稠油高效开发的关键技术,在渤海油田开发中得到了广泛应用,但目前该技术还存在注入参数不合理、转驱时机及井网不确定等问题。为了提高多元热流体技术在油藏开发全过程中的效果,以渤海A稠油油田区块的油藏参数建立数值模型,通过数值模拟方法对多元热流体吞吐阶段主要注入参数、转驱时机及井网、多元热流体驱阶段主要注采参数进行优化研究。结果表明,多元热流体技术在稠油油藏开发过程中,先以吞吐形式进行,当地层压力降至5 MPa左右时再转驱;多元热流体吞吐阶段,随地层压力减小,最佳注水强度先增大后减小,气水比先保持较低水平后大幅增大,气体中CO 2比例逐渐减小;多元热流体驱阶段,随含水率上升,最佳注水速度先减小后保持较低水平,最佳气水比的变化规律与注水速度基本相反。
Multi-thermal fluid technology is a key technology for efficient development of offshore heavy oil,which has been widely applied in the development of Bohai Oilfield.However,there are still some problems in the application of multi-thermal fluid technology such as unreasonable injection parameters,uncertain turning timing and well pattern.In order to improve the development performance of multi-thermal fluid technology in the whole development process,a numerical model was established according to the reservoir parameters of Block A in Bohai Oilfield,and the main injection parameters and turning timing and well pattern were optimized.The results show that it is better to turn from multi-thermal fluid huff and puff to multi-thermal fluid flooding when the formation pressure decreases to about 5 MPa.During the multi-thermal fluid huff and puff stage,with the decrease of formation pressure,the optimal water injection intensity first increases and then decreases,the gas-water ratio first keeps the low level and then increases greatly,and the proportion of CO 2 in the gas gradually decreases.During the multi-thermal fluid flooding stage,with the increase of water cut,the optimal water injection rate first decreases and then keeps a lower level,and the change law of optimal gas-water ratio is opposite to the water injection rate.
作者
孙永涛
李兆敏
王壮壮
林涛
孙玉豹
鹿腾
李松岩
SUN Yong-tao;LI Zhao-min;WANG Zhuang-zhuang;LIN Tao;SUN Yu-bao;LU Teng;LI Song-yan(Petroleum Engineering College,China University of Petroleum(East China),Qingdao 266580,China;Oilfield Production Research Institute,China Oilfield Services Limited,Tianjin 300450,China;Key Laboratory of Gas Hydrate,Ministry of Nature Resources,Qingdao Institute of Marine Geology,Qingdao 266071,China)
出处
《科学技术与工程》
北大核心
2020年第25期10255-10261,共7页
Science Technology and Engineering
基金
国家科技重大专项(2016ZX05058-003-009)。
关键词
稠油油藏
多元热流体
数值模拟
参数优化
heavy oil reservoir
multi-thermal fluid
numerical simulation
parameters optimization
