Multiphase Calcite Cementation and Fluids Evolution of a Deeply Buried Carbonate Reservoir in the Upper Ordovician Lianglitag Formation, Tahe Oilfield, Tarim Basin, NW China

Oil and gas have been found in the Upper Ordovician Lianglitag Formation carbonates in the Tahe Oilfield, Tarim Basin, NW China. This study documents the origin of diagenetic fluids by using a combination of petrology, SIMS, fluid inclusion, and radiogenic isotope analysis. Six stages of calcite cem...

Full description

Saved in:
Bibliographic Details
Main Authors: Jiaqing Liu, Zhong Li, Lijuan Cheng, Jiawei Li
Format: Article
Language:English
Published: Wiley 2017-01-01
Series:Geofluids
Online Access:http://dx.doi.org/10.1155/2017/4813235
Tags: Add Tag
No Tags, Be the first to tag this record!
_version_ 1832551448536154112
author Jiaqing Liu
Zhong Li
Lijuan Cheng
Jiawei Li
author_facet Jiaqing Liu
Zhong Li
Lijuan Cheng
Jiawei Li
author_sort Jiaqing Liu
collection DOAJ
description Oil and gas have been found in the Upper Ordovician Lianglitag Formation carbonates in the Tahe Oilfield, Tarim Basin, NW China. This study documents the origin of diagenetic fluids by using a combination of petrology, SIMS, fluid inclusion, and radiogenic isotope analysis. Six stages of calcite cements were revealed. C1-C2 formed in marine to early burial environments. C3 has relatively low δ18OVPDB values (−8.45‰ to −6.50‰) and likely has a meteoric origin. Meteoric water probably fluxed into aquifers during the Early Paleozoic and Late Paleozoic uplift. C4 has δ18OVPDB values typically 3‰ higher than those of C3, and probably formed during shallow burial. C5 displays relatively negative δ18OVPDB values (−8.26‰ to −5.12‰), and the moderate-to-high fluid-inclusion temperatures imply that it precipitated in burial environments. C6 shows homogenization temperatures (up to 200°C) higher than the maximum burial and much lower salinities (<10.61 wt% NaCl), which may suggest that the fluid was deeply recycled meteoric water. The average 87Sr/86Sr ratios of fracture- and vug-filling calcite cements are much higher, indicative of incorporation of radiogenic Sr. Caves and fractures constitute the dominant reservoir spaces. A corresponding diagenesis-related reservoir evolution model was established that favors exploration and prediction.
format Article
id doaj-art-2cd9e2586f0948e29a326658a80b41de
institution Kabale University
issn 1468-8115
1468-8123
language English
publishDate 2017-01-01
publisher Wiley
record_format Article
series Geofluids
spelling doaj-art-2cd9e2586f0948e29a326658a80b41de2025-02-03T06:01:20ZengWileyGeofluids1468-81151468-81232017-01-01201710.1155/2017/48132354813235Multiphase Calcite Cementation and Fluids Evolution of a Deeply Buried Carbonate Reservoir in the Upper Ordovician Lianglitag Formation, Tahe Oilfield, Tarim Basin, NW ChinaJiaqing Liu0Zhong Li1Lijuan Cheng2Jiawei Li3Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaInstitute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaInstitute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaResearch Institute of Tsinghua, Pearl River Delta, Guangzhou 510530, ChinaOil and gas have been found in the Upper Ordovician Lianglitag Formation carbonates in the Tahe Oilfield, Tarim Basin, NW China. This study documents the origin of diagenetic fluids by using a combination of petrology, SIMS, fluid inclusion, and radiogenic isotope analysis. Six stages of calcite cements were revealed. C1-C2 formed in marine to early burial environments. C3 has relatively low δ18OVPDB values (−8.45‰ to −6.50‰) and likely has a meteoric origin. Meteoric water probably fluxed into aquifers during the Early Paleozoic and Late Paleozoic uplift. C4 has δ18OVPDB values typically 3‰ higher than those of C3, and probably formed during shallow burial. C5 displays relatively negative δ18OVPDB values (−8.26‰ to −5.12‰), and the moderate-to-high fluid-inclusion temperatures imply that it precipitated in burial environments. C6 shows homogenization temperatures (up to 200°C) higher than the maximum burial and much lower salinities (<10.61 wt% NaCl), which may suggest that the fluid was deeply recycled meteoric water. The average 87Sr/86Sr ratios of fracture- and vug-filling calcite cements are much higher, indicative of incorporation of radiogenic Sr. Caves and fractures constitute the dominant reservoir spaces. A corresponding diagenesis-related reservoir evolution model was established that favors exploration and prediction.http://dx.doi.org/10.1155/2017/4813235
spellingShingle Jiaqing Liu
Zhong Li
Lijuan Cheng
Jiawei Li
Multiphase Calcite Cementation and Fluids Evolution of a Deeply Buried Carbonate Reservoir in the Upper Ordovician Lianglitag Formation, Tahe Oilfield, Tarim Basin, NW China
Geofluids
title Multiphase Calcite Cementation and Fluids Evolution of a Deeply Buried Carbonate Reservoir in the Upper Ordovician Lianglitag Formation, Tahe Oilfield, Tarim Basin, NW China
title_full Multiphase Calcite Cementation and Fluids Evolution of a Deeply Buried Carbonate Reservoir in the Upper Ordovician Lianglitag Formation, Tahe Oilfield, Tarim Basin, NW China
title_fullStr Multiphase Calcite Cementation and Fluids Evolution of a Deeply Buried Carbonate Reservoir in the Upper Ordovician Lianglitag Formation, Tahe Oilfield, Tarim Basin, NW China
title_full_unstemmed Multiphase Calcite Cementation and Fluids Evolution of a Deeply Buried Carbonate Reservoir in the Upper Ordovician Lianglitag Formation, Tahe Oilfield, Tarim Basin, NW China
title_short Multiphase Calcite Cementation and Fluids Evolution of a Deeply Buried Carbonate Reservoir in the Upper Ordovician Lianglitag Formation, Tahe Oilfield, Tarim Basin, NW China
title_sort multiphase calcite cementation and fluids evolution of a deeply buried carbonate reservoir in the upper ordovician lianglitag formation tahe oilfield tarim basin nw china
url http://dx.doi.org/10.1155/2017/4813235
work_keys_str_mv AT jiaqingliu multiphasecalcitecementationandfluidsevolutionofadeeplyburiedcarbonatereservoirintheupperordovicianlianglitagformationtaheoilfieldtarimbasinnwchina
AT zhongli multiphasecalcitecementationandfluidsevolutionofadeeplyburiedcarbonatereservoirintheupperordovicianlianglitagformationtaheoilfieldtarimbasinnwchina
AT lijuancheng multiphasecalcitecementationandfluidsevolutionofadeeplyburiedcarbonatereservoirintheupperordovicianlianglitagformationtaheoilfieldtarimbasinnwchina
AT jiaweili multiphasecalcitecementationandfluidsevolutionofadeeplyburiedcarbonatereservoirintheupperordovicianlianglitagformationtaheoilfieldtarimbasinnwchina