Geological Comprehensive Evaluation In Well Block Xinggu 1

Xinggu 1 is a wildcat well which was deployed to drill in Wuxing burial hill of Yitong basin by Jilin Oil field company,to implement the conditions of containing petroleum in the burial hill.The drilling result showed that there was a big reservoir in shallow Wanchang formation,but nothing in base rock..The key task of this geological comprehensive evaluation is intended to find the reasons of failure in purpose layer,which can provide guidance suggestion for this area future exploration.In this paper it has completed basic geological conditions evaluation,source rock qualitative and quantitative evaluation,reservoir evaluation and seal evaluation, at last we finished the analysis of reservoir forming condition and main controlling factors,which is on the base of previous research results and sysmetic analysising experimental data.The qualitative evaluation of source rock includes three aspects, which are abundance, type and maturity of organic matter; Quantitative evaluation results can tell us the amount of hydrocarbon generation and expulsion in the work area. For bad matrix properties of base rock, the focus of reservoir evaluation is the characteristics of fracture, and we reference standards to get the evaluation result. The seal evaluation study begins from macro and micro aspacts to mainly research seal conditions in the area. Based on the above research, Finally we confirm that adequate oil source, structural conditions and advantaged escape route are the controlling factors to formate hydrocarbon reservoirs in the work area.In the process of research we have mastered many distinctive technical achievements,including to use chemical kinetic theory to quantitatively evaluate source rock and bedrock reservoir evaluation,which can provide support for objectively evaluating source rock quality and reservoir properties.We have known that sealing bad and preservation conditions poor are main reasons which lead to fail in the purpose layer after researching,then we suggest that seal factor should be emphatically considered in this area deep exploration.