摘要
塔里木盆地顺北地区发育碳酸盐岩断控缝洞型油气藏储集体,现有建模算法难以精确表征其内部结构,亟需结合断控体内部构造特征开展储层建模算法研究,建立符合地质认知的精细三维地质模型,明确油气优势储集空间。以顺北4号断裂带为例,提出并应用了一种基于目标的建模方法,结合层次模拟的思想,定量表征了挤压段、拉分段与平移段的断裂面与类洞穴的发育规模。通过设计基于网格的储集体趋势线追踪算法,查找符合储集体发育走向的中心线,融合层次模拟的思想,逐层次刻画了断裂面与类洞穴内部栅状结构地质模型。在建立的地质模型的基础上,基于相控的方式建立物性模型,开展了储量计算与数值模拟,优选仅有断裂面的断控体模型,断裂面储量计算的结果与动态储量拟合率为96%,对井底压力、实际生产数据进行拟合,误差均小于10%。研究区主要可能储集类型为断裂面、类洞穴与杂乱体。对不同的地震属性体截断处理建立断控体轮廓模型。测井解释断裂面与类洞穴内部发育破碎带与基岩带有序排列的栅状结构,破碎带可进一步划分为角砾带与裂缝带。设计基于目标的建模方法,建立储集体内部栅状结构三维地质模型。优选仅有断裂面的断控体模型,该模型遵从钻测井条件数据,符合地质认知,对指导油气藏开发具有参考意义。
[Objective]Carbonate fault-controlled fracture-cavity reservoirs are present in the Shunbei area of the Tarim Basin,NW China.Existing modeling algorithms struggle to accurately characterize the internal structure.Urgently needed is research on reservoir modeling algorithms that incorporate the internal structural characteristics of the fault-controlled body.This will establish a detailed three-dimensional geological model aligned with geological understanding and clarify the primary reservoir spaces for oil and gas.[Methods and Results]In this paper,taking the Shunbei fault zone No.4 as an example,an object-based modeling method is proposed and applied for the first time.Combined with the idea of hierarchical simulation,the fracture plane and the development scale of caves type in the extrusion,pull-apart and translation stress sections are quantitatively characterized.By designing a grille-based reservoir trend line tracking algorithm,the center line that conforms to the development trend of the reservoir is found,and the idea of hierarchical simulation is integrated to describe the fracture plane and the grille-like filling structure model inside the cave type layer by layer.Based on the established geological model,a property model is created using the phase-controlled method.This model is used for reserve calculation and numerical simulation.Preference is given to the fault-controlled body model with only fracture planes.The fit between the calculated fracture plane reserves and dynamic reserves is 96%.The model also fits bottom hole pressure and actual production data,with an error less than 10%.The main reservoir types in the study area include fracture planes,caves type,and disordered bodies.A fault-controlled body contour model is established for different seismic attribute bodies.Logging interpretation identifies fracture plane and cave type internal developments within the bedrock and crush belt,forming an ordered grille structure.Crush belt further divided into breccia belt and fracture belt.An object-based modeling method creates a three-dimensional geological model of the reservoir's grille structure.[Conclusion]The model optimized for fracture plane reservoirs,aligns with drilling and logging data and geological understanding.It provides a reference for guiding oil and gas reservoir development.
作者
何云峰
陈叔阳
刘耀宇
王立鑫
丁旭东
尚浩杰
李文亮
刘杰
肖红
尹艳树
HE Yunfeng;CHEN Shuyang;LIU Yaoyu;WANG Lixin;DING Xudong;SHANG Haojie;LI Wenliang;LIU Jie;XIAO Hong;YIN Yanshu(SINOPEC Northwest Oilfield Company,Urumqi 830000,China;Key Laboratory of Exploration Technologies for Oil and Gas Resources,Ministry of Education,Yangtze University,Wuhan 430100,China)
出处
《地质科技通报》
北大核心
2025年第3期108-121,共14页
Bulletin of Geological Science and Technology
基金
国家自然科学基金项目(42372137)
油气资源与勘探技术教育部重点实验室(长江大学)开放基金项目(K2023-06)。
作者简介
第一作者:何云峰,E-mail:heyunfeng2316697@163.com;通信作者:尹艳树,E-mail:yys@yangtzeu.edu.cn。
