共查询到20条相似文献，搜索用时 353 毫秒
1.
天然气水合物研究的新进展 总被引：2，自引：1，他引：2
天然气水合物的调查评价刚刚起步，有关其成藏机理等许多问题有待解决。最近国际上关于天然气水合物资源和成藏机理的研究有新的进展，现根据大量的实际调查资料重新估算了天然气水合物资源量，并认为过去报道的资源量过高；海底天然气水合物的聚集与烃流体的垂向运移有关，泥火山底辟构造控制了海底天然气水合物的聚集和分布；天然气水合物的开采方式与常规油气藏开发不同，宜采用简单加热法、抑制剂法和减压法开采；近期应主要进行海底及浅层的天然气水合物勘探。 相似文献
2.
3.
天然气水合物开采井孔出砂问题研究 总被引：1，自引：0，他引：1
《海洋地质与第四纪地质》2017,(5)
天然气水合物是一种重要的非常规能源,但水合物开采出砂问题成为制约其走向商业化开发的关键因素。南海北部陆坡是我国天然气水合物的重要赋存区,其水合物主要以分散状弱胶结方式赋存,研究其出砂问题显得极为迫切。研究表明储层出砂的根本原因是储层介质强度降低,而水合物储层介质强度受到水合物胶结模式、水合物饱和度、孔隙流体压力、流速及生产压差等影响。本文在对比分析天然气水合物储层出砂与常规油气藏出砂特征的基础上,总结了弱胶结疏松砂岩油藏出砂研究方法,为天然气水合物储层开采井孔出砂的研究提供思路和参考。 相似文献
4.
5.
据日本经济产业省消息 ,开采天然气水合物的实验已获成功 ,并将在今后 1 0年开发实用技术 ,用于近海海底天然气水合物的开采。试验在加拿大西北部进行。一口深 1 2 0 0 m的井钻到天然气水合物层 ,通过井注入温水后 ,天然气水合物中的甲烷便溶在温水中 ,然后把溶有甲烷的温水抽回地面 ,进行分离得到甲烷。科学家预测 ,地球海底天然气水合物的蕴藏量约为 50 0亿亿立方米 ,相当目前世界年能源消费量的 2 0 0倍日本天然气水合物开采试验获得成功@蔡峰 相似文献
6.
黄霞王平康庞守吉肖睿张帅祝有海 《海洋地质前沿》2017,(11):18-27
极地天然气水合物资源潜力巨大,储层类型主要为富砂沉积物储层,最可能实现远景勘探和商业利用,是一种重要的战略能源。综述了天然气水合物在极地的分布情况、极地主要地区天然气水合物矿藏资源量以及水合物开发利用的资源金字塔。结合美国、加拿大和俄罗斯在北极冻土区天然气水合物勘探开发的案例进行了4种开采技术优缺点对比,并对极地区和非极地区5次天然气水合物试采效能进行对比评价。根据目前国际油气价格、能源结构、各国水合物研究目标和我国天然气水合物勘查开发现状等,提出了我国参与极地天然气水合物研究和开发的思路。 相似文献
7.
8.
9.
随着全球海域天然气水合物资源勘探工作的深入和油气开发技术装备水平的提升,深水浅层天然气水合物资源商业化开采的前景逐渐明晰。自2013年开始,日本、中国相继进行了多次海域水合物试开采尝试,连续产气时间、累计产气量和日均产气量逐步获得提升。2020年中国率先实现了从"探索性试采"向"试验性试采"的跨越。然而,以"降压"为核心理念的开采技术单井产气量瓶颈明显,制约了水合物资源产业化发展进程,必须在已有技术方法基础上创新发展,形成高效、安全、经济的海域天然气水合物资源开采专有技术体系。笔者梳理了近年来海域天然气水合物开采技术研发领域内的新进展,分析了包括"原位分解采气"和"原位破碎抽取"两大开采框架指导下,多种开采技术的创新升级进展和存在的主要问题,在此基础上展望了未来海域天然气水合物资源开采技术的研发方向。 相似文献
10.
海底天然气水合物是一种重要的新型能源矿产,美国、加拿大、德国等发达国家都将水合物列入国家重点发展战略。而中国、日本、韩国的研究工作起步时间相对较晚,过去十年,日本实施了"21世纪水合物研究开发计划(MH21)",韩国制订了"天然气水合物开发十年计划"。我国在水合物领域也做了大量的研究工作,在南海陆坡区钻探到了水合物样品,但与日、韩相比还存在一定的差距。文章通过总结日本、韩国天然气水合物研究的开发思路,旨在为我国海域天然气水合物的勘探开发和试开采计划提供借鉴和参考。 相似文献
11.
Timothy S. Collett Myung W. LeeWarren F. Agena John J. MillerKristen A. Lewis Margarita V. ZyrianovaRay Boswell Tanya L. Inks 《Marine and Petroleum Geology》2011,28(2):279-294
In the 1960s Russian scientists made what was then a bold assertion that gas hydrates should occur in abundance in nature. Since this early start, the scientific foundation has been built for the realization that gas hydrates are a global phenomenon, occurring in permafrost regions of the arctic and in deep water portions of most continental margins worldwide. In 1995, the U.S. Geological Survey made the first systematic assessment of the in-place natural gas hydrate resources of the United States. That study suggested that the amount of gas in the gas hydrate accumulations of northern Alaska probably exceeds the volume of known conventional gas resources on the North Slope. Researchers have long speculated that gas hydrates could eventually become a producible energy resource, yet technical and economic hurdles have historically made gas hydrate development a distant goal. This view began to change in recent years with the realization that this unconventional resource could be developed with existing conventional oil and gas production technology. One of the most significant developments was the completion of the BPXA-DOE-USGS Mount Elbert Gas Hydrate Stratigraphic Test Well on the Alaska North Slope, which along with the Mallik project in Canada, have for the first time allowed the rational assessment of gas hydrate production technology and concepts. Almost 40 years of gas hydrate research in northern Alaska has confirmed the occurrence of at least two large gas hydrate accumulations on the North Slope. We have also seen in Alaska the first ever assessment of how much gas could be technically recovered from gas hydrates. However, significant technical concerns need to be further resolved in order to assess the ultimate impact of gas hydrate energy resource development in northern Alaska. 相似文献
12.
刘金龙 王淑红 AsiriObeysekara XIANGJiansheng PabloSalinas ChristopherPain JonnyRutqvist 颜文 《热带海洋学报》2020,39(1):94-105
海洋天然气水合物稳定带气烟囱结构中存在被水合物充填的裂隙, 表明在自然条件下沉积物中曾发生过流体压裂以及相关的流体流动和水合物形成。在水合物稳定带内实施人为的流体压裂工程, 并联合其他方法(如降压或注热)进行水合物开采, 有望提高开采效率。水合物稳定带内, 无论是自然条件下发生的流体压裂过程, 还是人为实施的流体压裂工程, 都存在水合物反应和沉积物裂隙变形之间的耦合响应。当前, 已有不少数值程序对水合物反应与沉积物弹塑性变形的耦合过程进行了定量研究, 但尚没有数值程序能够计算水合物反应和离散裂隙变形之间的耦合过程。文章将TOUGH+Hydrate程序、IC-FERST和Solidity两者的耦合程序进行了进一步耦合, 为水合物稳定带内的流体压裂计算提供了一种耦合计算方法, 同时通过一个算例初步验证了该耦合计算方法的可行性。验证结果表明, 该耦合计算方法经进一步改进后有望应用于定量研究水合物稳定带内的裂隙变形和水合物反应过程。 相似文献
13.
海洋天然气水合物开采方法及产量分析 总被引：2，自引：0，他引：2
海洋天然气水合物的巨大储量刺激了世界各国能源部门努力研究如何从天然气水合物储层生产天然气。根据水合物形成的条件，只有当水合物处在其相平衡条件以外，水合物才能分解。因此，水合物的开采方法只能为热熔法、抑制剂刺激法、减压法和地面分解法。为了对天然气水合物储层中气体的生产有个定量的评估，本文以水合物开采井为例，运用数学方法推导了水合物井中气体的产生量。结果表明，在天然气水合物储层中，天然气释放量是井内水合物分解温度、压力及水合物层气体渗透性的敏感函数。该函数可以用于天然气水合物井气体开采量的计算及对水合物储层可开采性评价。 相似文献
14.
《Marine and Petroleum Geology》2012,29(10):1751-1767
Supplies of conventional natural gas and oil are declining fast worldwide, and therefore new, unconventional forms of energy resources are needed to meet the ever-increasing demand. Amongst the many different unconventional natural resources are gas hydrates, a solid, ice-like crystalline compound of methane and water formed under specific low temperature and high pressure conditions. Gas hydrates are believed to exist in large quantities worldwide in oceanic regions of continental margins, as well as associated with permafrost regions in the Arctic. Some studies to estimate the global abundance of gas hydrate suggest that the total volume of natural gas locked up in form of gas hydrates may exceed all known conventional natural gas reserves, although large uncertainties exist in these assessments. Gas hydrates have been intensively studied in the last two decades also due to connections between climate forcing (natural and/or anthropogenic) and the potential large volumes of methane trapped in gas hydrate accumulations. The presence of gas hydrate within unconsolidated sediments of the upper few hundred meters below seafloor may also pose a geo-hazard to conventional oil and gas production. Additionally, climate variability and associated changes in pressure-temperature regimes and thus shifts in the gas hydrate stability zone may cause the occurrence of submarine slope failures.Several large-scale national gas hydrate programs exist especially in countries such as Japan, Korea, Taiwan, China, India, and New Zealand, where large demands of energy cannot be met by domestic supplies from natural resources. The past five years have seen several dedicated deep drilling expeditions and other scientific studies conducted throughout Asia and Oceania to understand gas hydrates off India, China, and Korea. This thematic set of publications is dedicated to summarize the most recent findings and results of geo-scientific studies of gas hydrates in the marginal seas and continental margin of the Asia, and Oceania region. 相似文献
15.
2-D Numerical Simulation of Natural Gas Hydrate Decomposition Through Depressurization by Fully Implicit Method 总被引：1，自引：0，他引：1
Natural gas hydrate, as a potential energy resource, deposits in permafrost and marine sediment with large quantities. The current exploitation methods include depressurization, thermal stimulation, and inhibitor injection. However, many issues have to be resolved before the commercial production. In the present study, a 2-D axisymmetric simulator for gas production from hydrate reservoirs is developed. The simulator includes equations of conductive and convective heat transfer, kinetic of hydrate decomposi... 相似文献
16.
Occurrence and exploration of gas hydrate in the marginal seas and continental margin of the Asia and Oceania region 总被引：5，自引：0，他引：5
Ryo Matsumoto Byong-Jae Ryu Sung-Rock Lee Saulwood Lin Shiguo Wu Kalachand Sain Ingo Pecher Michael Riedel 《Marine and Petroleum Geology》2011,28(10):1751-1767
Supplies of conventional natural gas and oil are declining fast worldwide, and therefore new, unconventional forms of energy resources are needed to meet the ever-increasing demand. Amongst the many different unconventional natural resources are gas hydrates, a solid, ice-like crystalline compound of methane and water formed under specific low temperature and high pressure conditions. Gas hydrates are believed to exist in large quantities worldwide in oceanic regions of continental margins, as well as associated with permafrost regions in the Arctic. Some studies to estimate the global abundance of gas hydrate suggest that the total volume of natural gas locked up in form of gas hydrates may exceed all known conventional natural gas reserves, although large uncertainties exist in these assessments. Gas hydrates have been intensively studied in the last two decades also due to connections between climate forcing (natural and/or anthropogenic) and the potential large volumes of methane trapped in gas hydrate accumulations. The presence of gas hydrate within unconsolidated sediments of the upper few hundred meters below seafloor may also pose a geo-hazard to conventional oil and gas production. Additionally, climate variability and associated changes in pressure-temperature regimes and thus shifts in the gas hydrate stability zone may cause the occurrence of submarine slope failures.Several large-scale national gas hydrate programs exist especially in countries such as Japan, Korea, Taiwan, China, India, and New Zealand, where large demands of energy cannot be met by domestic supplies from natural resources. The past five years have seen several dedicated deep drilling expeditions and other scientific studies conducted throughout Asia and Oceania to understand gas hydrates off India, China, and Korea. This thematic set of publications is dedicated to summarize the most recent findings and results of geo-scientific studies of gas hydrates in the marginal seas and continental margin of the Asia, and Oceania region. 相似文献
17.
天然气水合物广泛分布于陆地冻土带和深海地层,资源潜力巨大,其中Ⅱ类水合物藏占有重要地位。为加强对Ⅱ类水合物藏开采规律的认识,结合实际水合物藏参数,使用数值模拟方法研究了热水驱替开采Ⅱ类水合物藏的动态规律,并与降压法的开采效果进行了对比分析。结果表明:①热水驱替开采Ⅱ类水合物藏时,产气速率和分解气速率首先快速上升,然后以较快速度下降至趋于相对稳定;累产气和累分解气上升较快;气体采出程度和水合物分解程度均处于较高水平(>60%)。②热水驱替对Ⅱ类水合藏的开采具有一定的适应性,与降压法开采相比,热水驱替方式下储层水合物的分解更彻底,气体采出程度、水合物分解程度也更优,但具有较低的累积气水比,产水量较大。 相似文献
18.
Natural gas hydrate, as a potential energy resource, deposits in permafrost and marine sediment with large quantities. The current exploitation methods include depressurization, thermal stimulation, and inhibitor injection. However, many issues have to be resolved before the commercial production. In the present study, a 2-D axisymmetric simulator for gas production from hydrate reservoirs is developed. The simulator includes equations of conductive and convective heat transfer, kinetic of hydrate decomposition, and multiphase flow. These equations are discretized based on the finite difference method and are solved with the fully implicit simultaneous solution method. The process of laboratory-scale hydrate decomposition by depressurization is simulated. For different surrounding temperatures and outlet pressures, time evolutions of gas and water generations during hydrate dissociation are evaluated, and variations of temperature, pressure, and multiphase fluid flow conditions are analyzed. The results suggest that the rate of heat transfer plays an important role in the process. Furthermore, high surrounding temperature and low outlet valve pressure may increase the rate of hydrate dissociation with insignificant impact on final cumulative gas volume. 相似文献
19.
测井技术在水合物储层识别中的应用前景 总被引：1，自引：0，他引：1
海洋天然气水合物是一种潜在的巨大能源。地球物理测井在天然气水合物探测与储量评价领域发挥了重要作用,并且随着以勘探天然气水合物为目的的钻井数量的增多日益受到重视。主要介绍了常规测井方法、成像测井和核磁测井在识别天然气水合物储层中的应用,发展海洋天然气水合物的识别技术,准确了解天然气水合物的分布与蕴藏量,对我国海洋天然气水合物产业的建立具有关键作用。 相似文献
20.
松辽盆地南部长岭断陷腰英台深层构造腰深1井井筒及输气管线发生水合物堵塞现象,分析认为天然气水合物是导致堵塞的原因。天然气水合物是在一定温度和压力条件下由天然气中烃分子与游离水结合而形成。计算出腰深1井水合物添加甲醇的合理量,通过从油管和套管添加甲醇,使该井恢复了正常生产,日产气量（6～12）×10^4m^3。防堵的关键是注入甲醇和连续平稳生产。 相似文献