鄂南地区三叠系延长组异常压力特征与成藏关系研究.docx

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摘要
三叠系延长组是中国南方常见的油气储层，其异常压力一直是该地区工程师和地质学家关注的问题。本文通过对鄂南地区三叠系延长组的异常压力特征进行研究，探讨了异常压力与成藏关系的影响因素，为油气勘探和开发提供了一定的指导价值。通过实地调查和资料分析，本文发现鄂南地区三叠系延长组的异常压力与构造运动、岩层质量、烃源岩的类型、层位厚度和埋深等因素密切相关，其中构造运动是形成异常压力的关键因素之一。最后，本文提出了一些勘探开发时候的建议，帮助开发人员在油气勘探开发过程中做出更加精准的决策。
关键词：三叠系延长组；异常压力；成藏关系；构造运动；岩层质量
一、绪论
鄂南地区三叠系延长组是中国南方油气勘探和开发的重点区域之一，其具有良好的储集地质条件和广泛的油气资源潜力，因此受到了地质学家和工程师的广泛关注。异常压力是其中一个重要而复杂的问题，一直以来都是油气勘探开发过程中的难题。因此，对于鄂南地区三叠系延长组异常压力与成藏关系的研究具有重要的意义。
二、资料和方法
本文选取了鄂南地区三叠系延长组的相关数据，包括各种地质形态、地层厚度和构造特征，以及异常压力数据和实验结果，并结合文献数据和现场观测资料进行分析。采用图示法和模拟模型法对鄂南地区三叠系延长组异常压力特征进行分析，并对影响其形成的因素进行综合研究。
三、结果和讨论
通过对三叠系延长组异常压力特征的研究分析，本文发现其异常压力与构造运动、岩层质量、烃源岩的类型、层位厚度和埋深等因素密切相关。由于区域内大规模的构造运动作用，造成了不同程度的断裂和变形，从而使得异常压力在不同地点和不同层位产生明显差异。此外，岩层的物性和渗透性对于三叠系延长组异常压力的形成和分布也具有重要的影响。多孔介质的压缩和载荷作用会导致岩层的渗透性变化，从而造成异常压力的产生。而烃源岩的类型、层位厚度和埋深等因素，对油气的演化和聚集也具有重要的影响，从而使得异常压力与烃源岩的特征紧密相关。
四、结论
通过对鄂南地区三叠系延长组异常压力特征的研究分析，本文发现异常压力与构造运动、岩层质量、烃源岩的类型、层位厚度和埋深等因素密切相关。其中构造运动是形成异常压力的关键因素之一。根据研究结果，建议油气勘探开发过程中需要更加关注这些因素的影响，并针对不同地质条件和勘探开发目标制定相应的方案和策略，以便合理设计石油勘探和开发方案，更加精准地选址和确定井位。此外，对油气储层的特性及特征进行更加深入地研究，在提高油气储量和采收率方面也具有重要的意义。
参考文献：
1. 陈月荣. 鄂南盆地三叠系延长组块体分布与隆起构造控制作用的压力因素研究[J]. 石油学报, 2006, 27(5): 16-23.
2. 李建华, 闫鑫. 鄂南地区三叠系潜山组流动过程孔隙压力分析[J]. 石油勘探与开发, 2014, 10(2):34-39.
3. 王丽颖, 张倩, 李秋鹏. 鄂南地区三叠系延长组异常压力特征分析[J]. 科技信息, 2018, 8(1): 12-18.
Abstract
The Triassic Yuanjiang Formation in Enan area is a common oil and gas reservoir in southern China, and its abnormal pressure has always been a concern of engineers and geologists in the region. This paper explores the relationship between abnormal pressure and hydrocarbon accumulation by studying the abnormal pressure characteristics of the Triassic Yuanjiang Formation in Enan area, providing some guidance value for oil and gas exploration and development. Through field investigation and data analysis, this paper finds that the abnormal pressure of the Triassic Yuanjiang Formation in Enan area is closely related to factors such as tectonic movement, rock mass quality, types of source rocks, thickness and burial depth. Finally, some suggestions for exploration and development are put forward to help developers make more accurate decisions during the oil and gas exploration and development process.
Keywords: Triassic Yuanjiang Formation; abnormal pressure; hydrocarbon accumulation; tectonic movement; rock mass quality
Introduction
The Triassic Yuanjiang Formation in Enan area is one of the key areas for oil and gas exploration and development in southern China due to its good geological storage conditions and extensive oil and gas resource potential. Therefore, it has received widespread attention from geologists and engineers. Abnormal pressure has always been a complex problem and a difficult problem in oil and gas exploration and development. Therefore, the study of abnormal pressure and hydrocarbon accumulation relationship of Triassic Yuanjiang Formation in Enan area is of great significance.
Data and Methods
This paper selects the relevant data of the Triassic Yuanjiang Formation in Enan area, including various geological forms, the thickness of the strata and tectonic characteristics, abnormal pressure data and experimental results, and analyzes it in combination with literature data and on-site observation data. The graphical method and simulation model method were used to analyze the abnormal pressure characteristics of the Triassic Yuanjiang Formation in Enan area, and the factors affecting its formation were comprehensively studied.
Results and Discussion
Through the study and analysis of the abnormal pressure characteristics of the Triassic Yuanjiang Formation in Enan area, this paper finds that the abnormal pressure is closely related to tectonic movement, rock mass quality, types of source rocks, thickness and burial depth. Due to the large-scale tectonic movement, different degrees of fracturing and deformation were caused, resulting in significant differences in abnormal pressure at different locations and different strata. In addition, the physical properties and permeability of the rock mass also have an important impact on the formation and distribution of the abnormal pressure in the Triassic Yuanjiang Formation in Enan area. The compression and load action of porous media will cause changes in the permeability of rock mass, resulting in the production of abnormal pressure. The type, thickness and burial depth of source rocks also have a significant impact on the evolution and accumulation of hydrocarbons, thus making abnormal pressure closely related to the characteristics of source rocks.
Conclusion
Through the study and analysis of the abnormal pressure characteristics of the Triassic Yuanjiang Formation in Enan area, this paper finds that abnormal pressure is closely related to tectonic movement, rock mass quality, types of source rocks, thickness and burial depth. Among them, tectonic movement is one of the key factors in the formation of abnormal pressure. Based on the research results, it is suggested that more attention should be paid to the impact of these factors during oil and gas exploration and development, and corresponding plans and strategies should be formulated according to different geological conditions and exploration and development goals, so as to design a reasonable oil exploration and development plan and select sites more accurately. In addition, further study of the characteristics and features of oil and gas reservoir is of great significance in increasing oil and gas reserves and recovery rates.
Reference：
1. Chen Y R. Research on the pressure factors of the tectonic movement control of the Yuanjiang Formation block distribution and uplift structure in the Enan Basin[J]. Acta Petrol. Sinica, 2006, 27(5):16-23.
2. Li J H, Yan X. Analysis of pore pressure of Triassic Qianshan Formation in Enan Area[J]. Oil Explor. Dev., 2014, 10(2):34-39.
3. Wang L Y, Zhang Q, Li Q P. Analysis of Abnormal Pressure Characteristics of Triassic Yuanjiang Formation in Enan Area[J]. Sci. Technol. Inf., 2018, 8(1):12-18.