全文: ? HTML (1 KB)?

文章導(dǎo)讀??

摘要? 川中古隆起北斜坡燈影組具有良好的勘探潛力，是四川盆地天然氣勘探重要的后備戰(zhàn)略接替區(qū),。北斜坡地區(qū)燈影組天然氣為以CH4 為主的干氣,，天然氣內(nèi)部δ13CC2H6、CO2 含量及δ13CCO2 等存在明顯差異,，天然氣組分及同位素差異因素的分析對深化燈影組天然氣成藏演化過程的研究具有重要意義,。本文基于北斜坡兩口典型探井(蓬探 1 井和中江 2 井)燈影組天然氣組分及不同組分同位素的分析，結(jié)合巖芯,、巖石薄片的觀察及儲層固體瀝青碳同位素,、顯微結(jié)構(gòu)的分析，深入剖析了造成北斜坡區(qū)典型探井天然氣差異的原因,。受硫酸鹽熱化學還原反應(yīng)(TSR)作用的影響,，北斜坡地區(qū)燈影組天然氣中存在較高含量的H2S，儲層瀝青碳同位素較烴源巖明顯偏輕,，C2H6 碳同位素偏重,。川中古隆起北斜坡區(qū)燈影組儲層受過熱液流體的影響，儲層內(nèi)黃鐵礦,、閃鋅礦,、方鉛礦等熱液礦物組合發(fā)育，儲層瀝青發(fā)育中—粗粒鑲嵌,、纖維狀等顯微結(jié)構(gòu),。熱液活動為TSR作用提供了豐富的硫源，熱液活動的強度是控制TSR反應(yīng)強度的關(guān)鍵,。強烈的TSR作用導(dǎo)致了天然氣組分的變化及C2H6,、CO2 碳同位素的增加，是造成不同區(qū)域天然氣差異的原因,。

	服務(wù)

	把本文推薦給朋友
	加入我的書架
	加入引用管理器

關(guān)鍵詞 ：天然氣,；儲層瀝青,；熱液活動；TSR；川中古隆起北斜坡區(qū)

Abstract：

The exploration results show that the Dengying Formation on the North Slope of the Central Sichuan paleo-uplift has

a good exploration potential, and it is an essential area for a natural gas reserve replacement strategy in the Sichuan Basin. The

natural gas in the north slope of the central Sichuan Paleo-uplift is dry natural gas, mainly composed of CH 4 . There are obvious

differences in the carbon isotopes of C 2 H 6 , the concentration of CO 2 and the carbon isotopes of CO 2 in the natural gas in the

Dengying Formation of the north slope area. The analysis of the controlling factors leading to the differences in natural gas is of

great significance to study the accumulation and evolution process of natural gas in the Dengying Formation. Based on gas com

ponent analysis and carbon isotope analysis of the different components in the Dengying Formation natural gas from two typical

exploration wells in the north slope area, namely the Pengtan-1 and Zhongjiang-2 wells, we combined drill core description,

microscopic observation of the thin sections, carbon isotope analysis and the microstructure of the reservoir solid bitumen in the

Dengying Formation to analyze the causes for the difference in natural gas of the Dengying Formation in the north slope area of

the central Sichuan Paleo-uplift. Influenced by thermochemical reduction of sulfate (TSR), there is a high content of H 2 S in the

natural gas of the Dengying Formation in the north slope area. The carbon isotopes of reservoir solid bitumen are lighter than

that of the source rock, and the C 2 H 6 . The formation of the reservoir solid bitumen of the Dengying Formation was controlled

by hydrothermal fluid activities. Hydrothermal mineral assemblages, such as pyrite, sphalerite, and galena, are developed in the

Dengying Formation reservoir. Medium-coarse mosaic and fibrous structures are developed in the solid bitumen filling in the

reservoir of the Dengying Formation, indicating hydrothermal fluid activities in the reservoir. Hydrothermal fluid provided an

abundant sulfur source for TSR. The intensity of hydrothermal fluid activities controlled the intensity of the TSR reaction. A

relatively strong TSR reaction leads to an increase in the concentration of CO 2 , carbon isotopes of C 2 H 6 and CO 2 of the natural

gas. The difference of TSR intensity in the reservoir is the cause of the difference in natural gas from different regions.

Key words： natural gas; reservoir bitumen; hydrothermal activity; TSR; north slope of middle Sichuan Paleo-uplift

收稿日期: 2021-09-29 ????

PACS:

?

基金資助:國家重點研發(fā)計劃(2017YFC0603106) 和國家自然科學基金青年基金項目(41802148) 資助

通訊作者: [email protected],，songzz@cup. edu. cn

引用本文: ??

朱聯(lián)強, 柳廣弟, 宋澤章, 趙文智, 田興旺, 戴鑫, 王云龍, 楊岱林, 李強, 江林, 李成海, 胡麗. 川中古隆起北斜坡不同地區(qū)燈影組天然氣差異及其影響因素——以蓬探 1 井和中江 2 井為例. 石油科學通報, 2021, 03: 344-355 ZHU Lianqiang, LIU Guangdi, SONG Zezhang, ZHAO Wenzhi, TIAN Xingwang, DAI Xin, WANG Yunlong, YANG Dailin, LI Qiang, JIANG Lin, LI Chenghai, HU Li. The differences in natural gas from the Dengying Formation in different areas of the north slope of the central Sichuan Paleo-uplift and its controlling factors—Taking Pengtan-1 and Zhongjiang-2 wells as examples. Petroleum Science Bulletin, 2021, 03: 344-355.

鏈接本文: ?

?