地化录井技术在油基钻井液环境下储层流体性质识别中的应用  

Application of geochemical logging technology to reservoir fluid property identification in oil-based drilling fluid environment

作　　者：宋昀轩 王雷 蔡军 鲁法伟 SONG Yunxuan;WANG Lei;CAI Jun;LU Fawei(Shanghai Branch of CNOOC Ener Tech-Drilling & Production Co., Shanghai 200030,China;CNOOC China Limited Shanghai Company, Shanghai 200030,China)

机构地区：[1]中海油能源发展股份有限公司上海工程技术分公司,上海市200030 [2]中海石油(中国)有限公司上海分公司

出　　处：《录井工程》2021年第4期66-72,共7页Mud Logging Engineering

基　　金：国家科技重大专项“东海深层低渗-致密天然气勘探开发技术”(编号:2016ZX05027)。

摘　　要：随着东海西湖凹陷宝云亭地区勘探向深层、复杂构造区推进,钻井现场引入油基钻井液以确保高效钻进。在录井过程中,由于该区荧光显示微弱且样品受油基钻井液干扰严重,快速识别储层含油气性难度很大。通过地化录井资料统计分析,总结出适用于该区油基钻井液环境下准确识别和评价储层流体性质的方法。该方法基于芳香烃区域参数Yx、地化热解S1值的校正值参数建立交会图板,可有效识别宝云亭地区储层轻质油、凝析气和水层,在定性对比油质轻重及确定流体界面位置方面也有很好的应用。实践证明,该评价方法有效解决了油基钻井液环境下储层流体判识的难题,现场应用效果良好,为该区储层的录井解释评价提供了可靠的技术手段和参考依据。As the exploration of Baoyunting area in Xihu Sag advances to the deep and complex structural areas,oil-based drilling fluid is introduced into the drilling site to ensure efficient drilling.While mud logging in this area,it is difficult to rapidly identify reservoir oil-bearing properties because of weak fluorescence show and serious interference of oil-base drilling fluid in samples.Through the statistical analysis of geochemical logging data,the method suitable for accurately identifying and evaluating reservoir fluid properties in oil-based drilling fluid environment in this area is summarized.This method establishes a crossplot chart of aromatic hydrocarbon regional parameter Yx and the corrected value of geochemical pyrolysis S1 value,which can effectively identify the light oil,condensate gas and water layer of reservoirs in Baoyunting area,and has good application in qualitative comparison of oil density and determination of fluid interface position.The practice proves that the evaluation method can effectively solve the problem of reservoir fluid identification in the oil-based drilling fluid environment,and the field application effect is good,providing reliable technical means and reference basis for mud logging interpretation and evaluation of reservoirs in this area.

关 键 词：油基钻井液 地化录井 流体性质识别 油气层评价 宝云亭地区 

分 类 号：TE132.1[石油与天然气工程—油气勘探]