| 摘要: |
| 为了研究含油气盆地下生上储式生储盖组合油气分布规律,在源断盖时间匹配有效性及其影响因素研究的基础上,通过确定源断配置输导油气时期与断盖配置封油气能力形成时期,将二者叠合建立一套源断盖时间匹配有效性的研究方法,并将其应用于渤海湾盆地南堡凹陷东二段储层的源断盖时间匹配有效性的研究中。结果表明:南堡凹陷东二段储层封闭型和不封闭型断盖配置封气能力形成时期分别为明化镇组下段沉积早期和明化镇组上段沉积早期,均晚于源断配置在东一段沉积时期的输导天然气时期,不利于天然气聚集成藏;而封闭型断盖配置封气能力形成时期为明化镇组下段沉积早期,早于源断配置在明化镇组—第四系沉积时期的输导天然气时期,有利于天然气聚集成藏;不封闭型断盖配置封气能力形成时期为明化镇组上段沉积早期,与源断配置在明化镇组—第四系沉积时期的输导天然气时期同期,较有利于天然气聚集成藏,源断盖时间匹配有效性相对较好；这与目前南堡凹陷东二段储层中大量天然气分布相吻合,表明该方法用于研究源断盖时间匹配有效性是可行的。 |
| 关键词: 源断盖 时间匹配 有效性 研究方法 |
| DOI：10.3969/j.issn.1673-5005.2020.01.003 |
| 分类号::TE 122 |
| 文献标识码:A |
| 基金项目:国家自然科学基金项目(41872157) |
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| Research method and its application to effectiveness of time matching of source-fault-caprock |
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FU Guang1, LIANG Mugui1, ZOU Qian2, MU Dawei3, LI Qiaoqiao4
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(1.School of Earth Sciences in Northeast Petroleum University, Daqing 163318, China;2.Research Institute of Petroleum Exploration ＆ Development, PetroChina, Beijing 100083, China;3.Xingang Company in Xinjiang Oilfield, PetroChina, Karamay 834000, China;4.No.1 Oil Production Plant, Daqing Oilfield Company Limited, Daqing 163001, China)
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| Abstract: |
| In order to study the oil-gas distribution patterns in lower generation-upper accumulation source rock-reservoir-cap rocks in oil-gas bearing basins, a set of research methods for the effectiveness of time matching of source-fault-caprock were established. The methods were derived based on influence factors and the effectiveness of time matching of source-fault-caprock, and by determining the transporting hydrocarbon period of source-fault configuration and the period of sealing ability of oil and gas formed of fault-caprock configuration. The new methods were then used to research study the effectiveness of time matching of source-fault-caprock of the reservoir in the 2nd member of Dongying Formation in Nanpu Depression of Bohai Bay basin. The results show that the period of sealing ability of gas formed of closed type fault-caprock configuration of the reservoir in the 2nd member of Dongying Formation in Nanpu Depression is the early deposition of lower member of Minghuazhen Formation and that for the unclosed type is the early deposition of upper member of Minghuazhen Formation. They are both later older than the transporting gas period of source-fault configuration during the deposition of the 1st member of Dongying Formation, which is unfavorable for gas accumulation. The period of sealing ability of gas formed of closed type fault-caprock configuration is the early deposition of lower member of Minghuazhen Formation. It is soon earlier than the transporting gas period of source-fault configuration during from the deposition of Minghuazhen Formation to Quaternary, which is favorable for gas accumulation. The period of sealing ability of gas formed of unclosed type fault-caprock configuration is the early deposition of upper member of Minghuazhen Formation. It is the corresponding period with the transporting gas period of source-fault configuration during from the deposition of Minghuazhen Formation to Quaternary, which is also favorable for gas accumulation, and the effectiveness of time matching of source-fault-caprock is relatively good. The results are coincident with that the oil and gas which has been found in the reservoir in the 2nd member of Dongying Formation in Nanpu Depression, and suggest that the method is feasible to be applied in researching the effectiveness of time matching of source-fault-caprock. |
| Key words: source-fault-caprock time matching effectiveness research method |
