The Study And Application Of The Prediction Technology Of Igneous Rock Reservoir In The Bin 3 Area Of Dongying Sag

The volcanic rocks in the Binnan area are subordinated to the Yangxin-Luojia igneous belt in the Cenozoic volcanic belt of the Shengli Oilfield.They are mainly distributed in the Binsan,Shangshang and Pingnan areas and are located on the northwestern margin of the Dongying depression of the Jiyang Depression.The volcanic activities in the Cenozoic are relatively strong due to the influence of the NW westward Yangxin Binxian fault and the NE westward Linshang basement deep fault.The volcanic rocks range from the east-west length of about 13km,and the north-south width is 10km,with an area about 130km~2.Among them,the Binsan igneous rock Hydrocarbons are the most abundant.The igneous rocks in the Binsan area have developed extensive overflow igneous rocks.The exploration of igneous rock in the study area has many difficulties,such as complicated structure,unclear distribution of vertical and horizontal distribution of reservoirs,inhomogeneous reservoirs with unstable plane distribution,and difficulty in characterization of igneous boundaries.To address these difficulties through domestic and foreign literature on igneous rock research,attribute analysis and inversion are important methods for igneous rock exploration.Good attribute profiles require fine-grained interpretation.In order to improve the interpretation accuracy,this paper first studied the lithofacies and earthquake reflection characteristics of the igneous rock in the working area,and had an overall understanding of the igneous rock in the study area.After fully understanding the igneous rock in the working area,well location calibration and horizon interpretation were performed.The attribute extraction analysis predicts the distribution range of igneous rocks,and it is necessary to optimize the favorable properties of the igneous rocks,and to comprehensively explain the distribution of the igneous rock in the working area by the profile of favorable properties.Property profiles can clearly depict the distribution of igneous rock boundaries.The most important predictions for reservoir exploration are horizontal and vertical resolutions.However,general seismic data can only provide intermediate frequency information and predict relatively high horizontal resolution.However,there is no means to increase the vertical resolution of low and high frequencies.The well logging data contains high and low frequency information,so well logging seismic data can be comprehensively used to perform well constrained inversion,so as to achieve the purpose of improving seismic resolution.Through theoretical analysis and application in actual data,it is believed that the simple boundary-based sparse pulse inversion based on acoustic wave is still inaccurate in characterizing igneous rock boundaries.In the analysis of predecessors'studies on igneous rocks,it was found that gamma curves are very sensitive to igneous rocks.Therefore,inversion is performed using the gamma sound wave reconstruction curve,and more accurate results are obtained.After the completion of these tasks,a detailed interpretation of the igneous rock horizon is made in conjunction with the actual well data.Due to the discontinuity of the vertical development of igneous rocks,the research area was divided into three igneous rock development areas.By analyzing the favorable factors for the development of igneous rock reservoirs,it is believed that the development of fractured pores is an important oil control factor for igneous rock reservoirs.Based on previous research experience,frequency and amplitude attributes are applied to explain igneous rocks.Comprehensive prediction of favorable areas of igneous rock reservoirs.Finally,we summarized the types of igneous lithofacies in the working area,and concluded that the volcanic breccia and the overflowing basalt are rich in oil reservoirs.It is considered that the pseudo-acoustic inversion of the igneous rock in this area is effective.The development of the igneous rock and the migration of the reservoir in this area are all conducted through fractures.The faults and porosity development zones can be used to predict igneous rocks and reservoirs.