Favorable interval for shale oil prospecting in coring Well L69 in the Paleogene E<em>s</em><sup>3L</sup>in Zhanhua Sag,Jiyang Depression,Bohai Bay Basin

Li Zhiming; Tao Guoliang; Li Maowen; Jiang Qigui; Cao Tingting; Liu Peng; Qian Menhui; Xie Xiaomin; Li Zheng

doi:10.11743/ogg20190203

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Favorable interval for shale oil prospecting in coring Well L69 in the Paleogene Es^3Lin Zhanhua Sag,Jiyang Depression,Bohai Bay Basin
Vol. 40, Issue 2, Pages: 236-247(2019)
Online First：28 April 2019，

Published：2019
DOI： 10.11743/ogg20190203
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DOI：

Li Zhiming, Tao Guoliang, Li Maowen, et al. Favorable interval for shale oil prospecting in coring Well L69 in the Paleogene Es^3Lin Zhanhua Sag,Jiyang Depression,Bohai Bay Basin[J]. 2019, 40(2): 236-247. DOI: 10.11743/ogg20190203. DOI：

摘要

为探讨渤海湾盆地济阳坳陷沾化凹陷L69井沙河街组三段下亚段（沙三下亚段）取心段页岩油勘探有利层段，对L69井沙三下亚段取心段典型岩相样品和获工业页岩油产量的XYS9井沙三下亚段取心段典型岩相样品，开展了常规热解和多温阶热释法分析，对比研究其含油性与不同赋存形式油含量特征，结合其他影响页岩油产量的因素综合评价页岩油勘探有利层段。结果表明：L69井埋深3 040.35~3 072.10 m富有机质纹层状泥质灰岩段，其游离油总量尤其是轻烃校正后游离油S

1-1

含量显著低于获工业页岩油产量的XYS9井沙三下亚段的含量，并且油饱和指数（OSI）均值仅为67 mg/g，不具有页岩油勘探潜力；埋深3 116.90~3 126.70 m含有机质纹层状泥质灰岩段，虽其油饱和指数（OSI）均在100 mg/g以上，平均达204 mg/g（样品数n=8），但游离油总量和轻烃校正后游离油S

1-1

含量显著低于获工业页岩油产量的XYS9井沙三下亚段的含量，页岩油勘探潜力较低；埋深2 994.10~3 010.90 m富有机质层状泥质灰岩、灰质泥岩段，其游离油总量尤其是轻烃校正后游离油S

1-1

含量和油饱和指数（OSI），与获工业页岩油产量的XYS9井沙三下亚段的含量基本相近或相等，并且该层段微裂缝发育、具异常压力、脆性矿物含量高和存在成熟运移油的贡献，为页岩油勘探的有利层段。

Abstract

This paper aims to identify the favorable interval for shale oil prospecting in the cored interval of the lower section of the third member of the Shahejie Formation (Es

) from Well L69 in Zhanhua Sag

Jiyang Depression

Bohai Bay Basin.To study their oil content and occurrence

typical lithofacies samples from the cored intervals of Es

in wells with commercial shale oil production

Well L69 and Well XYS9

were comparatively analyzed with routine Rock-Eval pyrolysis method and thermal desorption method

and the favorable interval for shale oil prospecting and factors affecting shale oil production were assessed.Results show that the total content of free oil

especially the content of free oil S

1-1

after light hydrocarbon correction

for the organic-rich lamellar argillaceous limestones at a depth of 3 040.35m to 3 072.10m in Well L69

is obviously lower than that of cored interval with commercial shale oil production in Well XYS9

and the average Oil Saturation Index(OSI) is only 67 mg/g

both of which indicate no exploration potential for shale oil.The total content of free oil

especially the content of free oil S

1-1

after light hydrocarbon correction

for organic-rich lamellar argillaceous limestones at a depth of 3 116.90m to 3 126.70m in Well L69

is obviously lower than that of cored interval of the Es

3(L)

with commercial shale oil production from Well XYS9

though the OSIs are usually larger than 100mg/g with an average of 204mg/g

suggesting a lower shale oil exploration potential.The total content of free oil

especially the content of free oil S

1-1

after light hydrocarbon correction

and the OSI of organic-rich laminar argillaceous limestones and calcareous mudstones at a depth of 2 994.10m to 3 010.90m in Well XYS9

are similar or almost equal to those of the cored interval of the Es

3(L)

with commercial shale oil production from Well XYS9; characterized by developed micro-fractures

abnormal pressure

high contents of brittle minerals and contribution of mature oil migration

the cored interval at the depth of 2 994.10m to 3 010.90m should be a favorable interval for shale oil exploration.

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Controlling effects of lamina assemblages on shale oil enrichment for lacustrine carbonate-rich shales： A case study of shales in the Paleogene Shahejie Formation， Jiyang Depression， Bohai Bay Basin

Classification and quantitative characterization of microscopic pores in organic-rich shale of the Shahejie Formation in the Zhanhua Sag,Bohai Bay Basin

Oil content and occurrence in low-medium mature organic-rich lacustrine shales: A case from the 1stmember of the Eocene-Oligocene Shahejie Formation in Well Luo-63 and Yi-21,Bonan Subsag, Bohai Bay Basin

Geological characteristics， enrichment model， and exploration practices of shale oil in the fourth member of the Shahejie Formation， Western Sag of the Liaohe Depression， Bohai Bay Basin

Diagenetic evolution and formation mechanisms of high-quality shale reservoirs for mixed shales in the Jiyang Depression， Bohai Bay Basin： A case study of shales in the Chunshang interval of the upper sub-member of the 4th member of the Shahejie Formation， Minfeng Sub-sag

Favorable interval for shale oil prospecting in coring Well L69 in the Paleogene Es3Lin Zhanhua Sag,Jiyang Depression,Bohai Bay Basin

DOI： 10.11743/ogg20190203

摘要

Abstract

关键词

Keywords

references

Favorable interval for shale oil prospecting in coring Well L69 in the Paleogene Es^3Lin Zhanhua Sag,Jiyang Depression,Bohai Bay Basin