[1]石玉江,么勃衛,夏宏泉.致密油儲層巖石各向異性的動態聲學實驗研究[J].測井技術,2019,43(03):228-234.[doi:10.16489/j.issn.1004-1338.2019.03.002]
 SHI Yujiang,YAO Bowei,XIA Hongquan.Experimental Study on Dynamic Acoustics of the Rock Anisotropy in Tight Oil Reservoir[J].WELL LOGGING TECHNOLOGY,2019,43(03):228-234.[doi:10.16489/j.issn.1004-1338.2019.03.002]
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致密油儲層巖石各向異性的動態聲學實驗研究()
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《測井技術》[ISSN:1004-1338/CN:61-1223/TE]

卷:
第43卷
期數:
2019年03期
頁碼:
228-234
欄目:
實驗研究
出版日期:
2019-06-30

文章信息/Info

Title:
Experimental Study on Dynamic Acoustics of the Rock Anisotropy in Tight Oil Reservoir
文章編號:
1004-1338(2019)03-0228-07
作者:
石玉江1 么勃衛2 夏宏泉2
(1.長慶油田分公司勘探開發研究院, 陜西 西安 710021; 2.西南石油大學油氣藏地質及開發工程國家重點實驗室, 四川 成都 610500)
Author(s):
SHI Yujiang1 YAO Bowei2 XIA Hongquan2
(1. Research Institute of Exploration and Development, PetroChina Changqing Oilfield Company, Xi'an, Shaanxi 710021, China; 2. State Key Laboratory of Oil and Gas Reservoir Geology and Development Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China)
關鍵詞:
實驗研究 致密油儲層 各向異性 聲學速度 巖石力學 泊松比
Keywords:
experimental study tight oil reservoir anisotropy acoustic velocity rock mechanics Poisson's ratio
分類號:
P631.84
DOI:
10.16489/j.issn.1004-1338.2019.03.002
文獻標志碼:
A
摘要:
致密油儲層具有明顯的聲速和力學各向異性特征,各向同性的動態聲學和巖石力學評價方法對致密油儲層存在明顯的不適用性,因此開展巖石各向異性聲學和力學實驗研究。針對鄂爾多斯盆地隴東地區長6、長7和長8段致密油儲層全直徑巖心,進行多尺度多方位(0°,45°,60°,90°)鉆取水平樣和垂直樣,對圓柱體巖樣和方巖樣進行常溫常壓下的聲學參數測量,開展模擬地層條件下高溫變圍壓的巖石聲學參數測量。研究發現,取心角度和圍壓明顯影響縱橫波速度的大小,當取心角度由0°向90°變化,其波速逐漸減小,且當垂直樣的縱波橫波速度比小于21/2時,其動態泊松比為負值。另外,基于實驗波速和密度值計算的剛度系數也表現出明顯的各向異性特征,由此計算的泊松比和彈性模量較傳統方法計算結果,更能反映低孔隙度低滲透率致密油儲層的3D巖石力學各向異性。該實驗結果為建立各向異性儲層的動靜態巖石力學參數轉換模型和精準計算水平地應力提供了重要依據。
Abstract:
Tight oil reservoirs are characterized by obvious anisotropic acoustics and mechanics. Isotropic dynamic acoustics and mechanics evaluating methods are not applicable for tight oil reservoirs. It is necessary to carry out acoustic and mechanical experiments on rock anisotropy. Full-diameter, multi-sized and multi-azimuth cores(0°, 45°, 60°, 90°)were sampled from the tight oil reservoirs in Chang 6, Chang 7 and Chang 8 oil-bearing formations in Longdong, the Ordos Basin, including horizontal and vertical core samples. The cylindrical and square cores were measured by acoustic experiments at normal temperature and pressure, and then at downhole conditions(variable confining pressure and high temperature). The experiment results indicate that coring azimuth and confining pressure significantly affect the velocities of P wave and S wave. When the azimuth is from 0° to 90°, the velocity decreases gradually, and when the vp/vs ratio of the vertical sample is less than 21/2, the dynamic Poisson's ratio is negative. In addition, the stiffness coefficient calculated based on the experimental velocity and density is obviously anisotropic, and the Poisson's ratio and modulus of elasticity are better than those calculated by a traditional method, which can reflect the 3D mechanical anisotropy of the tight oil reservoir with low porosity and permeability. The experimental results provide an important basis for establishing dynamic and static mechanic parameter conversion models for anisotropic reservoirs and for accurately calculating horizontal stresses.

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備注/Memo

備注/Memo:
基金項目: 國家科技重大專項“鄂爾多斯盆地大型低滲透巖性地層油氣藏開發示范工程”(2016ZX05050) 第一作者: 石玉江,男,1971年生,教授級高級工程師,博士,從事測井解釋綜合研究。E-mail:[email protected] 通訊作者: 么勃衛,男,1992年生,碩士研究生,從事巖石力學、偶極聲波成像測井的精細解釋及應用研究。E-mail:[email protected]
更新日期/Last Update: 2019-08-30
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