摘要
塔里木盆地富满油田FY1井区奥陶系深层缝洞型油气藏内部储层非均质性强,钻井钻进过程中的漏失井段主要以裂缝—孔洞型储层为主,放空井段主要以孔洞型—洞穴型储层为主,需要针对性地在空间刻画不同尺度断裂破碎体。为此,基于前人研究成果,以走滑断裂破碎空腔在地震剖面上呈非均质、强能量的特征为切入点,提出了深层缝洞体地震特征提取与能量脊线追踪方法,通过改进的方位扇区约束贪婪算法追踪缝洞体非均质能量脊线,以落实断裂破碎构造的核带结构或栅状结构特征。具体步骤为:①地震资料预处理。基于地震数据进行地层倾角扫描和构造层位解释等预处理。②非均质能量脊线追踪。提取非均质地震信息,结合精细井震标定结果确定有效均方根振幅属性值域与数据截断,再基于阈值截断追踪数据、识别非均质能量脊线。③钻井校验与分析。结合精细标定结果,分析非均质能量脊线数据与钻井、测井和累计产液量等数据之间的相关性,以确认不同尺度的断裂识别结果。应用实例表明,FY1井区深层缝洞体非均质能量脊线识别结果与钻具放空、泥浆漏失等匹配率达到98.5%,可有效揭示优质缝洞储层空间发育位置并支撑井位部署。
The Ordovician deep fractured-vuggy reservoirs in Well Fuyuan-1 of the Fuman Oilfield in the Tarim Basin exhibit strong internal reservoir heterogeneity.During the drilling process,drilling fluid leakage mainly occurs in fracture-vuggy reservoirs,while the well sections that are emptied primarily consist of vuggy-cave reservoirs.It is necessary to spatially characterize fracture and fault systems of different scales with specificity.Therefore,based on previous research,this study uses the heterogeneity and high-energy characteristics of the internal cavities in the strike-slip faults in seismic profiles as a starting point and proposes a method for extracting seismic features and tracking energy ridges in deep fracture-vuggy reservoirs.An improved greedy algorithm with azimuth sector constraints is used to track the ridges with heterogeneous energy in fractured-vuggy reservoirs,to identify the features of core band structures or grid-like structures in fracture and fault systems.The specific steps are as follows.①Seismic data preprocessing.Preprocessing is performed based on seismic data,including stratigraphic dip angle scanning and structural layer interpretation.②Heterogeneous energy ridge tracking.Heterogeneous seismic information is extracted to determine the effective root mean square am plitude attribute range and data truncation based on precise well-seismic calibration results.Heterogeneous energy ridges are then identified based on threshold truncation tracking data.③Drilling verification and analysis.Based on the precise calibration results,the correlation between heterogeneous energy ridge data and drilling,logging,and cumulative fluid production data is analyzed to validate the fault identification results at different scales.The application example shows that the identification results of heterogeneous energy ridges in the deep fractured-vuggy reservoirs of Well Fuyuan-1 show a 98.5%match with emptying,mud loss,and other factors,which can effectively reveal the spatial development position of
作者
张银涛
林承焰
罗枭
李正阳
李会元
袁安意
ZHANG Yintao;LIN Chengyan;LUO Xiao;LI Zhengyang;LI Huiyuan;YUAN Anyi(School of Geosciences,China University of Petroleum(East China),Qingdao,Shandong 266580,China;Exploration and Development Research Institute,Tarim Oilfield Company,CNPC,Korla,Xinjiang 841000,China)
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2024年第5期1132-1140,共9页
Oil Geophysical Prospecting
基金
中国石油天然气股份有限公司科学研究与技术开发项目“多尺度缝洞型油藏储层静态刻画及动态描述技术研究”(2021DJ1501)
塔里木油田公司科研项目“富源1井区走滑断裂识别及储层地震预测技术攻关研究”(041011070114)联合资助。
关键词
FY1
井区
深层缝洞体
贪婪算法
非均质能量脊线
Well Fuyuan-1
deep fractured-vuggy reservoirs
greedy algorithm
heterogeneous energy ridges
