Reservoir Comprehensive Treatment Technology Research In Wangjiawan The Central Yanchang Reservoir 2

Based on apricot sichuan oilfield, the wangs bay district 2 reservoir as the research object, using the development adjustment technology research at home and abroad the latest development and deployment, in view of the research area of reservoir geological characteristics, reservoir characteristics, fluid properties and the main problems existing in the development process, from reservoir fine geologic research, such as geologic, logging and production performance data as the means, in order to make clear problems existing in the process of oilfield development, and reveal the rule of reservoir development and formulate a comprehensive solution as the goal, with the combination of dynamic and static research method, the integrated use of multi-disciplinary theories, methods and technology, the fine geological conditions and dynamic constraints, quantitatively and comprehensively reveal the development features of the chang 2 reservoir development adjustment scheme is put forward. Research has shown that long 21 belongs to a typical braided river facies, sandstone continuity is better, in the north east, south west distribution, the main reservoir is given priority to with braided channel microfacies. Reservoir natural energy is low, has the characteristics of low compositional maturity; Intergranular pore is the main pore type, followed by dissolution hole; Belongs to the weak and strong water sensitivity, acid sensitivity to improve, weak weak salt sensitivity, velocity sensitivity of reservoir; Have the feature of weak water-water; With a strong heterogeneity. System to carry out the reasonable development technical policy limit, has been clear about the production pressure difference, flowing pressure, oil and water Wells ratio, injection-production ratio, production speed, injection pressure, reasonable boundaries, such as single well production capacity for the comprehensive control scheme design and provide the basis for a correct prediction. The wangs bay area of remaining oil distribution mainly exists imperfect injection-production well pattern, non-mainstream line area stranded, waterflooded area insufficient water type and other types. For the distribution of remaining oil is proposed:in the study area in the plane, one is the local enrichment of remaining oil in the area can consider drilling infilling of narrow row spacing, increase pressure gradient, to weaken the adverse impact of start-up pressure, improve the single well production; The second is in relatively dense well spacing area implementation of injection-production structure adjustment, change the seepage field. End longitudinal, Wells, in view of the long-term water flooding caused by a plane, injected water problem such as short circuit loop, the augmented injection Wells, wall crack, chemical profile and fine separation water injection technology means such as water, reduce the invalid water injection rate, increase the rate of underground water. The well side, acidification, repeated fracturing, broken down, every technological means such as mining, filling holes, in the degree of formation pressure to keep good and remaining oil enri chment area, to extract effect and improving fluid producing profile, increase the degree of reservoir with.