【作者】 孙致学；

【导师】 冯文光；

【作者基本信息】 成都理工大学 ， 油气田开发工程， 2005， 硕士

【摘要】 储量评价是气田开发设计的基础,储量评价结果直接关系到气田开发规模、各项开发指标预测的可靠性及整体效益,是开发决策的重要依据。洛带气田蓬莱镇组和遂宁组气藏具有低渗、低压、低产能、储量大丰度低、非均质强等特点,属于典型的致密低渗气藏。其天然气探明储量动用难度大,气井的平均单井日产量低、剩余储采比高,如何客观地评价这些难动用探明储量,为开发决策提供可靠依据已成为洛带气田开发过程中一项急需解决的难题。收集整理了洛带气田蓬莱镇组和遂宁组气藏静态地质资料,历年试采资料,压力产能数据、不稳定试井资料,气藏流体分析化验数据,气井压裂资料等,以动态特征研究评价为主,结合气藏静态地质资料,对洛带气田的难动用探明储量进行了综合研究及评价。 通过对气藏地质情况的再认识,得出了结合川西地区低渗致密砂岩气藏的难动用储量的概念;通过对气藏单井目前产能和井口压力与初始值的对比研究,得出了目前气藏产能和压力优势分布区域,对气藏压力和深度关系的研究,得出气藏地层压力;收集了洛带气田蓬莱镇组和遂宁组气藏的104井次的压力恢复资料,并进行了试井解释,结合气田的致密低渗实际,在前人研究基础上,提出了试井解释的近井带渗流模型,储层渗流模型和边界反映段;并对压裂井进行了压裂前后的试井解释,结果对比,加砂压裂投产是洛带气田气井的投产的主要方式,增产效果明显;调研天然气可采储量标定的多种方法,并结合洛带气田实际情况,对方法进行了改进和修正。在此基础上研究了气藏气井产能变化情况,得出气藏气井产量递减类型以指数型为主,并计算出蓬莱镇组68口井和遂宁组气藏7口井单井可采储量;在综合研究气藏各类动态指标基础上,结合气井开采中的3个经济极限值一经济极限产量、经济极限初产量及经济极限可采储量,对洛带气田蓬莱镇组气藏和遂宁组气藏开发前景做了综合对比评价,认为遂宁组气藏较蓬莱镇组气藏具有更好的开采价值。更多还原

【Abstract】 Gas Reserves Evaluation is the basis of gas field development design. The result of Gas Reserves Evaluation is connected directly with the scale of gas field development and reliability of all kinds of indexes of development and also connected with holistic benefit. The Penglaizhen group gas reservoir and Suining group gas reservoir is typical of low permeability, low pressure, low productivity, large reserves but low abundance, strong heterogeneity gas reservoir. The employment of proved reserves of gas reservoir is difficult, the daily gas rate of well is low, and the ratio of remained reserves and recoverable is high. Then how to evaluate the part of proved reserve and give the foundation of gas field development is the problem for the development of Luodai Gas Field problem. In the research, static geological data, the productive data of reservoirs, the pressure of wells, pressure build-up data for well test, the fiuids(gas, oil and water) produced from reservoirs’ analysis and test data and the data of water fractured are collected. Connect with static geological reservoirs data, research and evaluate the hardy employed proved reserves of Luodai Gas Field integrative.By the research of geology of the gas reservoir, induced the concept of hardy employ reserve; by contrast the pressure and productivity of wells with the initial and current, induced predominance distributed area of the high productive ability and high pressure of well; collected 104 wells’ pressure build up data of Penglaizhen group and Suining group gas reservoirs and interpreted it by Saphir 2.30. On the basis of research, brought forward well modern, reservoir model and boundary model of well test interpretation; also interpreted the fractured wells’ pressure, the result indicates that water fracture is the main development means for Luodai Gas Field. Survey many kinds of methods of calculation for gas reserves, and according to the practice of Luodai Gas Field, the methods are improved and modified. Then calculated the well’s recoverable reserve of Penglaizhen group gas reservoir and Suining group gas reservoir. With the detailed research on reservoir dynamic character, combined with economic utmost productivity. And by the integrative evaluation of Penglaizhen group gas reservoir and Suining group gas reservoir, Suining group gas reservoir is better than Penglaizhen group gas reservoir.更多还原