精品素人自拍偷拍|91精品国产av国产|杨思敏伦理片|91制片厂杨柳信息|亚洲激情综合|蜜桃影像传媒ios下载|亚洲精品视频在线看|打屁股色网站|爱豆文化传媒影片|国产欧美精品一区二区色,明星换脸 av,国产日韩成人av,亚洲成a人影院

 
 
 
文章檢索
首頁» 過刊瀏覽» 2022» Vol.7» Issue(1) 61-70???? DOI : 10.3969/j.issn.2096-1693.2022.01.006
最新目錄| | 過刊瀏覽| 高級檢索
四川盆地不同埋深龍馬溪頁巖水力裂縫縫高延伸形態(tài)及 差異分析
譚鵬,,金衍,陳剛
1 中國石油大學(xué)(北京)石油工程學(xué)院,,北京 102249 2 中國石油集團(tuán)工程技術(shù)研究院有限公司,,北京 102206
Differences and causes of fracture height geometry for Longmaxi shale with different burial depths in the Sichuan basin
TAN Peng, JIN Yan , CHEN Gang
1 State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum-Beijing, Beijing 102249, China 2 Research Institute of Drilling technology, CNPC Engineering Technology R&D Company Limited, Beijing 102206, China

全文: ? HTML (1 KB)?
文章導(dǎo)讀??
摘要? 不同埋深龍馬溪頁巖縫高形態(tài)與延伸規(guī)律不同,隨著埋深增加,,頁巖 縫高形態(tài)逐漸由瘦高型過渡為矮胖型,中深層頁巖縫網(wǎng)類型呈以橫切 縫為主縫的魚骨刺狀裂縫網(wǎng)絡(luò),,深層頁巖縫網(wǎng)類型呈以層理縫為主縫 的多側(cè)向臺階狀裂縫網(wǎng)絡(luò),。
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 : 深層頁巖,;縫網(wǎng)壓裂;裂縫形態(tài),;縫高,;穿層
Abstract

Due to the combined effects of complex in-situ stress states and geological characteristics of the Longmaxi shale formation, the hydraulic fracture height growth geometry and propagation exhibited great differences at different burial depths. In this paper, through many true triaxial fracturing experiments of deep and medium-deep shale outcrops, the hydraulic fracture propagation height behavior of shale at different burial depths was summarized, and the main influencing factors were obtained. Moreover, considering the effects of two dominant influence factors, namely the bonding strength and the frictional characteristics of shale bedding planes, a three-dimensional numerical model to describe the interaction mechanism between the hydraulic fracture and the beddings was established. The effects of interface strength and in-situ stress on fracture penetration behavior were evaluated quantitatively, and then a comprehensive chart was proposed. Results showed that according to the intersection relationship between the hydraulic fracture and the bedding planes, five basic types of the hydraulic fracture initiation and propagation near the wellbore in shale were obtained: ① Hydraulic fracture initiated and propagated perpendicular to the bedding planes; ② Hydraulic fracture initiated and propagated paralleled to the bedding planes; ③ Hydraulic fracture initiated and propagated perpendicular to the bedding planes. During fracture propagation, a fishbone-like fracture network was induced by diverging from and bypassing the weak bedding planes; ④ Hydraulic fracture initiated and propagated paralleled to the bedding planes. During the fracture propagation, penetration behavior occurred as the bonding strength of the bedding plane was larger while arrest or swerve behaviors occurred as the bonding strength of the bedding plane was smaller; ⑤ Hydraulic fracture initiated and propagated simultaneously from a few natural fractures near the initiation point, and then diverted into a different propagation path by the bedding planes. The hydraulic fracture network in the vertical direction gradually changed from a small horizontal sweep type to a large horizontal sweep type as the depth increased. The final fracture pattern for the medium-deep shale was a fishbone fracture network with transverse fractures as main fractures, while for the deep shale the stepped fracture network with horizontal fractures was the main fracture pattern. The bedding cementing strength and vertical stress difference coefficient determined the intersection mode between the hydraulic fracture and beddings, thus controlling the final fracture height morphology of shale formation with different depths. The findings obtained in this paper could provide an insight for understanding the geometry and behavior of shale fracture networks and guide the fracturing treatment.

Key words: deep shale; network fracturing; fracture geometry; fracture height; layer penetration
收稿日期: 2022-03-30 ????
PACS: ? ?
基金資助:國家自然科學(xué)基金面上項(xiàng)目(51874321) 資助
通訊作者: [email protected], [email protected]
引用本文: ??
譚鵬, 金衍, 陳剛. 四川盆地不同埋深龍馬溪頁巖水力裂縫縫高延伸形態(tài)及差異分析. 石油科學(xué)通報(bào), 2022, 01: 61-70 TAN Peng, JIN Yan, CHEN Gang. Differences and causes of fracture height geometry for Longmaxi shale with different burial depths in the Sichuan basin. Petroleum Science Bulletin, 2022, 01: 61-70.
鏈接本文: ?
版權(quán)所有 2016 《石油科學(xué)通報(bào)》雜志社