| After years of drilling development and well network encryption, The main block of high developed reservoir in Jilin Dalaoyemiao oilfield is put into production successively. Complexity and difficulty gradually deepened. It is also getting harder to find new favorable areas in the old oil field. So In order to find out the oil and gas reserves and recoverable reserves of Jilin Dalaoyefu region, to further develop the detailed development plan, improve the means of exploitation, et al. The research work of reservoir geological characteristics in the research area is carried out. Jilin Dlaoyefu, developed three sets of oil-bearing series: Putaohua reservoir(Yaojia group A), Gaotaizi reservoir Castle Peak(group A), Fuyu oil layer(Quantou group).The Gaotaizi reservoir is one of the key containing formations in oilfield productivity and construction with larger extension built production potential, In order to study further this work is carriwd out In this paper, making use of previous research achievements and knowledge Combined with 3-D seismic data, based on sequence stratigraphy, sedimentology petroleum geology, tectonics of multidisciplinary and other related theory. Then comprehensively analyse Jilin Dalaoye Prefecture’s seismic, logging and core data, Research work geological characteristics of Gaotaizi reservoir in Dalaoyefu region is completed.In this Article, based on the existing data of this project the geological characteristics of the distribution level was studied orderly. First, take. the characteristics of the tectonic evolution of Songliao Basin as the background the research on structure and fracture characteristics was made. According to the cyclic characteristic of formation lithology or rlithofacies change and the combination characteristic that reflected on the power curve shape. The target layer is divided into 1 long term cycles, four middle term cycles, 11 short-term base cycles. Take the synthetic seismogram as a bridge, fimished stratigraphic calibration, 11 layers’ structure interpretation that belong to GI, GII, GIII, GIV four sand group work was completed. Make use of relationship between time and deep, established 3D velocity field, and structural maps are also made. Then based on the structural map and seismic data, the ectonic characteristics and fracture characteristics of the target horizon of our study area is analysis. The structural evolution of of the research project follow the tectonic evolution background of Songliao basin. The basin has experienced four evolution stages. and formed the unique characteristics of sedimentary strata and sequence stratigraphic framework. Faults are mainly distributed in the edge of the dome, Inside the dome doesn’t exit. Secondly, combined with the background of the sedimentary environment in the study area, single well well facies pattern is established. Combined with the characteristics of attribute, drawed the sedimentary facies map, study sedimentary geological features. The distribution of each sand group of Gaotaizi reservoir sandstone is stability, the sedimentary features is considered to be delta sedimentary facies. Thirdly, By means of drilling core data, according to the sand body distribution, Analysis and summarize the physical properties of oil reservoir characteristics in Gaotaizi. The sand body is connectivity, superposition is ontiguous, Finally, combined with the source reservoir cap assemblage and forming patterns and distribution of oil and water, etc, carry out the research of reservoir formation rule, establish the oil and gas accumulation model of research area, analysis thereservoir type, Preferably favorable exploration zone.In this these the geological characteristics of Gaotaizi reservoir is studied deeply, the reservoir dynamics is analyzed, and favorable zone is forecasted accurately. To ensure the feasibility of the follow-up oil field exploitation Broaden the research ideas. There is a positive effect on quiching the pace of oil gas exploration in Jilin. In addition, it can also provide technical support for further evaluation of reservoir for the old oil infilling adjustment and deeper. |
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