| Fengcheng oilfield is located in the northwestern margin of Junggar basin,as one of the focus of the Fengcheng oilfield development blocks.What's more,the study group of the Qigu J3q3 reservoir belongs to the typical ultra heavy oil reservoir.At present,the old areas in Xinjiang oilfield are faced with grim situation:the heavy oil development facing accumulated proven geological reserves are below to the geological reserves that are produced under the current situation.If there are no new reservoirs,it will affect the stable yield goal to be realized for the whole oilfield.We combine field collection of drilling,core,logging with other primary sources in order to carry out the research about the interestedformation development and sedimentary characteristics,qualitative description and quantitative analysis of the "four sex" relationships,and the calculated reserves value.The Qigu group J3q3 in Fengzhong 010 wellblock of the middle cycles can be divided into three short cycles.Integrated with all kinds of facies markers,and also by means of the sedimentology research method of point-line-plane,the results tell us that the Qigu group J3q3 in Fengzhong 010 wellblock is braided river delta plain subfacies.With the aid of modern analytical test data,the studied reservoir is belong to class I and class II that is medium-good reservoir,its lithology for different grade is rock debris or feldspathic lithic sandstone,with high hole high permeability primary intergranular pore.Established the logging interpretation model of reservoir parameters,not only got the related factors of low resistance oil layer,but also selected the appropriate reserves parameters to calculate the reserve value.Through the above systematacially research,it could lay the foundation in 2015 for successfully completing the proven reserves task,also provides the reference for the development of Fengcheng oilfield in the future. |
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