“大埋深、高压力”条件下塔里木盆地超深层油气勘探前景

顾忆; 万旸璐; 黄继文; 庄新兵; 王斌; 李淼

doi:10.11781/sysydz201902157

“大埋深、高压力”条件下塔里木盆地超深层油气勘探前景

doi: 10.11781/sysydz201902157

中国石化石油勘探开发研究院无锡石油地质研究所, 江苏无锡 214126

基金项目:

中国石化科技部项目"海相烃源岩发育特征与油气成藏过程研究"（P16090）资助。

详细信息

作者简介:
顾忆(1962-),男,教授级高级工程师,从事油气地质勘探研究。E-mail:guyi.syky@sinopec.com。

中图分类号: TE122.3
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出版历程
- 收稿日期: 2019-01-03
- 修回日期: 2019-03-04
- 刊出日期: 2019-03-28

Prospects for ultra-deep oil and gas in the “deep burial and high pressure” Tarim Basin

Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, China

摘要

摘要: 随着塔里木盆地超深层油气勘探技术日益完善，烃源岩在高压力下的热演化已成为超深层油气资源评价及成烃理论研究的焦点。通过对国内外温压控制下烃源岩生烃模拟实验和成果的研究，结合塔里木盆地顺托果勒低隆"大埋深、高压力"的地质条件，探讨了塔里木盆地海相烃源岩高压生烃演化抑制模式。顺托果勒低隆寒武系烃源岩在燕山期以来仍具有形成高成熟液态烃的地质条件，其热演化受抑制的边界条件为：①构造长期稳定的封闭体系；②烃源岩埋深大于6 500 m，流体压力长时间持续大于60 MPa，晚期低地温场背景（地温梯度小于2.0℃/hm）；③烃源岩母质类型为Ⅰ、Ⅱ₁型。塔里木盆地超深层寒武系海相烃源岩以Ⅰ型、Ⅱ₁型干酪根为主，在高压条件下抑制程度更明显，其生油窗范围及潜力远高于传统的理论计算值，因此超深层油气勘探潜力巨大。
- 有机质热演化 /
- 高压 /
- 生烃演化抑制模式 /
- 超深层 /
- 油气勘探潜力 /
- 烃源岩 /
- 寒武系 /
- 塔里木盆地
Abstract: Ultra-deep oil and gas exploration technology is developing, and the thermal evolution of source rocks under high pressure in the Tarim Basin has become the focus of ultra-deep oil and gas resource evaluation and hydrocarbon generation theory research. Simulated hydrocarbon generation from source rocks under high temperature and pressure, combined with the geological conditions of “deep burial and high pressure” of the Shuntuoguole Uplift in the Tarim Basin, a study was carried out on the hydrocarbon generation, evolution and retardation under high pressure of marine source rocks in the Tarim Basin. Ever since the Yanshan period, the Cambrian source rocks still have geological conditions for generating high-maturity liquid hydrocarbon in the Shuntuoguole Uplift. The boundary conditions for thermal evolution retardation include: ①Long-term stable closed system; ②Source rocks deeper than 6 500 m with the fluid pressure above 60 MPa, and a low temperature with a gradient less than 20 ℃/km in the later period; ③Marine source rocks with type I and type Ⅱ₁ kerogen. The ultra-deep Cambrian marine source rocks in the Tarim Basin are mainly type I and type Ⅱ₁ kerogen, and the degree of inhibition is more obvious under high pressure. The scope and potential of the oil generation window are much higher than the traditional theoretical value. Therefore, the prospect for ultra-deep oil and gas exploration is considerable.
- thermal evolution of organic matter /
- hydrocarbon evolution and retardation mode under high pressure /
- ultra-deep formation /
- oil and gas exploration potential /
- source rock /
- Cambrian /
- Tarim Basin /

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