南堡凹陷天然气成因类型与勘探领域分析

doi:10.3969/j.issn.1672-7703.2017.06.003

摘要/Abstract

摘要： 通过对南堡凹陷天然气赋存特征、地球化学特征及其成因类型和分布特征的研究，分析了天然气的勘探领域。南堡凹陷油气资源丰富，目前的勘探以石油为主。馆陶组、明化镇组、东营组及沙河街组均有油气分布，纯气层、凝析气层主要分布在东一段与东二段，原油溶解气在各层位均有分布。已发现天然气以湿气为主，少量干气。气层在北堡构造、南堡1号构造、南堡2号构造、南堡5号构造分布较多。天然气类型以过渡型为主，其次为腐殖型，腐泥型相对较少。3种类型的天然气均具有较强的垂向运移作用，其中过渡型与腐泥型天然气的垂向运移作用更强。陆上中浅层原油中溢出的天然气成藏区与凹陷深层及斜坡部位的近源致密砂岩气藏、岩性气藏或轻质油气藏分布区是重要的油气勘探领域，浅层天然气类型以过渡型为主、部分为腐泥型，深层可以有腐泥型、腐殖型与过渡型3种不同类型。

关键词: 天然气成因, 过渡型天然气, 腐殖型天然气, 勘探领域, 南堡凹陷

Abstract: The occurrence, geochemistry,genesis and distribution of the natural gas were studied for analysis of the natural gas exploration fieldsin the Nanpu sag. The Nanpu sag is rich in oil and gas resources, where at present, the primary exploration target is oil. Oil and gas resources have been found in the Guantao, Minghuazhen, Dongying and Shahejie Formations, pure gas and condensate gas are mainly distributed in the 1^st and 2^nd Members of the Dongying Formation, and solution gas is distributed in all formations. The discovered natural gas is mostly wet gas with a small amount of dry gas, which are mostly distributed in the Beipu Structure, the Nanpu 1 Structure, the Nanpu 2 Structure and the Nanpu 5 Structure. The first type of the natural gas is transitional, second humic and third sapropelic. These three types of natural gas show stronger tendency of vertical migration, especially the transitional and the sapropelic gas. The important oil and gas exploration fields in this sag include:the natural gas accumulation of the overflowing gas from shallow-middle continental oil pools, and the near-source tight sandstone gas pools, lithologic gas pools or light oil and gas pools in the deep layers and the slope of the Nanpu sag.Shallow gas is mainly transitional and local gas is sapropelic. Deep gas includes sapropelic, humic and transitional type.

Key words: natural gas genesis, transitional natural gas, humic natural gas, exploration field, Nanpu sag

中图分类号:

TE122.1

高岗, 董月霞, 杨尚儒, 赵忠新, 董岩, 刚文哲. 南堡凹陷天然气成因类型与勘探领域分析[J]. 中国石油勘探, 2017, 22(6): 16-26.

Gao Gang, Dong Yuexia, Yang Shangru, Zhao Zhongxin, Dong Yan, Gang Wenzhe. Genetic types and exploration field analysis of natural gas in Nanpu sag[J]. China Petroleum Exploration, 2017, 22(6): 16-26.

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