Research On Geological Characteristics And Evaluation On Potential Of Additional Reserves For Mao 803-mao 402 Blocks

The research area is Mao803-Mao402 block.Located on the transitional zone between chaoyang groove terrace and sanzhao sag,the tectonic body is located in the southwest region of chaoyang groove terrace,which is the downward sloping position of the nose-shaped structure of the head platform in the north and west strike.The research block is a typical low permeability reservoir,and it is a key research block for handing over proved reserves and oil controlled reserves in recent years.In recent years,with the deepening of oilfield development,the original understanding cannot meet the demand of oilfield development in the study area,some exposed the shortcomings and problems,such as complex oil-water distribution,structure and fault knowledge is not clear,the lower level of reservoir prediction,the potential oil and gas distribution is unknown,and so on.Therefore,in view of the above problems,the following work has been carried out in this paper.In this paper,we study of nearly 200 km2 in 402 and mau mau 803 block within the scope of two pieces of seismic data fidelity billiton amplitude,frequency and reasonably to improve the resolution of seismic data,and the Portuguese I oil group top interface and fuyu oil layer interface for fine structure interpretation.The 242 drilling and logging data were collated and statistically analyzed,the sedimentary microfacies types were refined,and the high precision geostatistical inversion was carried out.The sand problem thickness prediction and effective sand thickness prediction of grapevine and fuyu reservoirs in two blocks in the study area were carried out.Through in-depth analysis of well logging interpretation data and oil testing data in the study area,the distribution characteristics of oil and water in the study area are summarized and the reservoir profile of the study area is drawn.Finally,on the basis of the above research work,the deployment plan of evaluation Wells and horizontal Wells in the research area is proposed and discussed.In order to optimize the advantageous blocks and increase the reserves,it is of great significance to the later exploration and development of oil field.