沁南区块煤层气数值模拟及开发方案研究

发布时间：2018-04-28 23:22

本文选题：煤层气 + 地质建模　；参考：《东北石油大学》2015年硕士论文

【摘要】：煤层气是一种新型高效节能的清洁能源,开发利用煤层气,对于改善煤矿安全生产,保护人类赖以生存的大气环境以及充分利用洁净能源,具有重要的意义。煤层气属于非常规天然气,目前我国对其勘探开发程度不高,可参考的资料较少,本文以《煤层气田开发方案编制规范》为基本纲领,在气田描述、综合分析和经济指标的基础上,推荐本煤层气目标区块开发的最佳方案,对指导今后的煤层气开发有着重要的战略意义。在对研究区块煤层气储层的地理位置、交通及勘探排采数据进行分析的基础上,结合对气藏的地层、构造、煤系及煤层特征、煤储层的描述的理解,对气藏工程部分进行设计,气藏工程设计主要包括储量计算、开发方式选择、层系划分、井网部署及合理布井方案确定及其相关内容;分析研究区块的原始含气特征、吸附特征,计算其储层临界解吸压力、裂缝孔隙度及原始含气饱和度,用于下步地质建模。利用容积法确定煤层气藏地质储量;计算出研究区块的预测可采储量及采收率;利用五种产能预测方法对单井产能进行预测,确定直井与U型井的合理产能。采用PETREL软件建立气藏精细地质模型,利用FLOGRID软件将建立起的单孔地质模型转化为双孔地质模型,通过CMG与ECLIPSE 2011数值模拟软件联合使用对布井方案进行预测,在历史拟合精度较高的基础上进行开发方案设计,设计布井方案15套,其中9套直井矩形井网,5套等边三角形井网,1套U型井与直井联合布井开发,最终确定U型井与直井联合开发方案为最优方案。基于上述对沁南区块煤层气田总体开发方案的设计,最后进行经济评价,并分别以煤层气价格、产量、成本和投资,作为不确定因素进行敏感性分析确保该开发方案的可行性和经济效益。
[Abstract]:Coal bed methane (CBM) is a new type of clean energy with high efficiency and energy saving. It is of great significance to develop and utilize CBM to improve the safety of coal mine production, to protect the atmospheric environment on which mankind depends and to make full use of clean energy. Coalbed methane is a kind of unconventional natural gas. At present, the degree of exploration and development of CBM in China is not high, and the reference data are less. This paper takes "Code for Coalbed methane Field Development Scheme" as the basic program and describes it in the gas field. On the basis of comprehensive analysis and economic indexes, it is of great strategic significance to recommend the best scheme for the development of the target block of CBM in order to guide the development of CBM in the future. Based on the analysis of the location, traffic and exploration data of the coalbed methane reservoir in the study block, combined with the understanding of the formation, structure, coal measures and coal seam characteristics of the gas reservoir and the description of the coal reservoir, the engineering part of the gas reservoir is designed. The engineering design of gas reservoir mainly includes the calculation of reserves, the selection of development mode, the division of strata, the arrangement of well pattern, the determination of reasonable well arrangement and its related contents, the analysis of the original gas-bearing characteristics and adsorption characteristics of the block, The reservoir critical desorption pressure, fracture porosity and original gas saturation are calculated for the next geological modeling. The volume method is used to determine the geological reserves of coalbed methane reservoir; the predicted recoverable reserves and recovery factor of the study block are calculated; the single well productivity is forecasted by five productivity prediction methods, and the reasonable productivity of the straight well and the U type well is determined. The fine geological model of gas reservoir is established by PETREL software, and the single hole geological model is transformed into a double pore geological model by FLOGRID software. The well layout scheme is predicted by the combination of CMG and ECLIPSE 2011 numerical simulation software. On the basis of high precision of historical fitting, the development scheme is designed and 15 sets of well layout schemes are designed, among which 9 sets of rectangular well pattern and 5 sets of equilateral triangle well pattern and 1 set of U type well and vertical well combined layout well development. Finally, the joint development scheme of U-well and vertical well is determined as the optimal scheme. Based on the above design of the overall development plan of the coalbed methane field in Qinnan block, the economic evaluation is carried out at the end, and the price, output, cost and investment of the coalbed methane are used separately. Sensitivity analysis as an uncertain factor ensures the feasibility and economic benefit of the development scheme.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13;TE37

【参考文献】