地化分级优选法在兴隆台潜山的应用

The application of geochemical grading optimum method in Xinglongtai buried hill

兴隆台太古宇潜山裂缝性油藏的勘探开发于2007年全面启动,地化录井技术为跟进钻井作业,需要解决超过1000 m的巨厚井段潜山的快速评价难题。针对这一情况,根据试油井数据分析中的各种流体之间地化特征的联系和差别,发现随着含油丰度的降低,地化整体上表现出热解地化数据由高到低、气相色谱谱图特征从油层到干层的规律,把地化数据对应油层、低产油层、干层或水层进行分级,据此建立地化评价标准,然后在新井应用中验证、改进,形成地化分级优选法。通过现场应用表明,地化分级优选法是一种快速准确的现场评价方法,可及时有效地提供解释结果,为卡层完钻、定层射孔等作业项目提供有力的技术支持。

The exploration and development for the fractured reservoir of Archaean group buried hill in Xinglongtai buried hill entirely started in 2007,in order to follow the drilling operation,the geochemical logging technology needs to solve the problem of fast evaluation for the buried hill with immense thick interval more than 1000m.In accordance with this condition,according to the linkage and difference of geochemical features between various fluids from well testing data analysis,the authors discovered the rule that pyrolysis data raised from low to high while gas chromatograph spectrum feature changes from oil zone to dry zone with the decreases in oil bearing abundance.The geochemical data were divided into gradation which reflected the property of separate oil zone,low productive zone,dry zone or water zone and the geochemical evaluation standard with gradation was established.And then the geochemical grading optimum method was formed by verifying,improving during the application in new wells.It was showed by site practice that the geochemical grading optimum method is a fast and accurate site evaluation method,which can provide the interpretation results in time and the powerful technical supports for completion sticking zones and determining perforation interval.