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Wide/narrow azimuth acquisition footprints and their effects on seismic imaging

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petroleum Science 2008年第4期5卷 308-313页

作者： Di Bangrang Xu Xiucang wei Jianxin key laboratory of CNPC Geophysical Exploration China University of Petroleum Beijing 102249 China state key {2. of {2. resource and prospecting China University of Petroleum Beijing 102249 China key laboratory of Earth {2. and Information Technology China University of Petroleum Beijing 102249 China

Acquisition footprint is a new concept to describe the seismic noise in three-dimensional seismic exploration and it is closely related to geometry and observation shuttering. At present, the study on acquisition footprints has become a hot spot. In partnership with the Dagang Oilfield, we used the channel sand body seismic physical model to study the characteristics of wide/narrow azimuth acquisition footprints and analyzed and compared the two types of footprints and their effects on target imaging. In addition, the footprints caused by data processing of the normal moveout offset （NMO） stretching aberration were discussed. These footprints are located only in the shallow or middle layer in the time slice, and possibly affect the imaging of shallow target layers, and have no influence on deep target imaging. Seismic physical modeling has its advantages in the study of acquisition footprints.

关键词： Wide/narrow azimuth geometry acquisition footprint stretching aberration time slice seismic imaging

Study on attribute characterization for reservoir dynamic monitoring by seismic

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Science china Earth Sciences 2008年第S2期51卷 218-225页

作者： CHEN XiaoHong1,3,LI JingYe2,3 & ZHAO wei4 1 key Lab of Geophysical Exploration of CNPC,china petroleum University,{2.,china 2 Basin & Reservoir Research Center,china petroleum University,{2.,china 3 state key laboratory of petroleum resource and prospecting,china University of petroleum,{2.,china 4 Research Center of CNOOC,beijing 100027,china 1. key Lab of Geophysical Exploration of CNPC China Petroleum University Beijing 102249 China 3. state key {2. of {2. resource and prospecting China University of Petroleum Beijing 102249 China 2. Basin & Reservoir Research Center China Petroleum University Beijing 102249 China 4. Research Center of CNOOC Beijing 100027 China

Study on characterizing reservoir parameters dynamic variations by time-lapse seismic attributes is the theoretical basis for effectively distinguishing reservoir parameters variations and conducting time-lapse seismic interpretation,and it is also a key step for time-lapse seismic application in real oil fields. Based on the rock physical model of unconsolidated sandstone,the different effects of oil saturation and effective pressure variations on seismic P-wave and S-wave velocities are calculated and analyzed. Using numerical simulation on decoupled wave equations,the responses of seismic amplitude with different offsets to reservoir oil saturation variations are analyzed,pre-stack time-lapse seismic attributes differences for oil saturation and effective pressure variations of P-P wave and P-S converted wave are calculated,and time-lapse seismic AVO (Amplitude Versus Offset) response rules of P-P wave and P-S converted wave to effective pressure and oil saturation variations are compared. The theoretical modeling study shows that it is feasible to distinguish different reservoir parameters dynamic variations by pre-stack time-lapse seismic information,including pre-stack time-lapse seismic attributes and AVO information,which has great potential in improving time-lapse seismic interpreta-tion precision. It also shows that the time-lapse seismic response mechanism study on objective oil fields is especially important in establishing effective time-lapse seismic data process and interpreta-tion scheme.

关键词： time-lapse seismic dynamic monitoring rock physical model pre-stack attribute Amplitude Versus Offset (AVO)

Enhancing the resolution of seismic data based on the generalized S-transform

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petroleum Science 2009年第2期6卷 153-157页

作者： Tian Jianhua Song wei yang Feizhou state key {2. of {2. resource and prospecting China University of Petroleum Beijing 102249 China key laboratory of CNPC Geophysical {2. China University of Petroleum Beijing 102249 China

In this paper, we analyze the seismic signal in the time-frequency domain using the generalized S-transform combined with spectrum modeling. Without assuming that the reflection coefficients are random white noise as in the conventional resolution-enhanced techniques, the wavelet which changes with time and frequency was simulated and eliminated. After using the inverse S-transform for the processed instantaneous spectrum, the signal in the time domain was obtained again with a more balanced spectrum and broader frequency band. The quality of seismic data was improved without additional noise.

关键词： Time-frequency domain generalized S-transform spectrum modeling instantaneous spectrum balanced spectrum

Experimental study on the e ect of fracture scale on seismic wave characteristics

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petroleum Science 2008年第2期5卷 119-125页

作者： wei Jianxin Di Bangrang Wang Qiang state key {2. of {2. resource and prospecting CNPC Key Lab of Geophysical Exploration China University of Petroleum Beijing 102249 China

In fractured reservoir beds, fracture characteristics affect seismic wave response. Fractured models based on the Hudson＇s fractured medium theory were constructed in our laboratory by a backfilling technique. For the same fracture density, the variations of the velocity and amplitude of the primary wave and shear wave parallel and perpendicular to the fracture were observed by altering the diameter （scale） of the penny-shaped fracture disk. The model test indicated that an increase of fracture scale increased the velocity and amplitude of the primary wave by about 2.. When the shear wave propagated parallel to the fracture, the velocity of the fast shear wave hardly changed, while the velocity of slow shear wave increased by 2.6% with increasing fracture scale. The results indicated that an increase of fracture scale would reduce the degree of anisotropy of the shear wave. The amplitudes of slow shear waves propagating parallel and perpendicular to fractures decreased with increasing fracture scale.

关键词： Fracture scale Hudson's fracture theory primary wave and shear wave velocity anisotropy,model test

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渤海海域现今地温场分布特征

石油与天然气地质 2009年第4期30卷 412-419页

作者：邱楠生魏刚李翠翠张媛郭永华中国石油大学油气资源与探测国家重点实验室北京102249 中国石油大学盆地与油藏研究中心北京102249 中海石油(中国)有限公司天津分公司技术部天津300452

渤海海域平均大地热流值为(60.9±8.7)mW/m2.其中石臼坨凸起、沙磊田凸起和渤南凸起热流值高达70～80mW/m2.渤中凹陷、黄河口凹陷和秦南凸起次之,其热流值也达到65～75mW/m2.辽东湾、庙西、莱州湾、歧口、沙南、埕北等地区热流值较低,... 详细信息

渤海海域平均大地热流值为(60.9±8.7)mW/m2.其中石臼坨凸起、沙磊田凸起和渤南凸起热流值高达70～80mW/m2.渤中凹陷、黄河口凹陷和秦南凸起次之,其热流值也达到65～75mW/m2.辽东湾、庙西、莱州湾、歧口、沙南、埕北等地区热流值较低,基本上都在65mW/m2.下。渤海海域平均地温梯度为30.8℃/km,但各构造单元存在差异,其中沙磊田凸起、渤中、渤南、石臼坨等地区地温梯度明显较高,一般为32.42./km之间;凹陷区地温梯度低,一般为2.～32./km之间。渤海海域地温场的分布与渤海海域的构造形态相似,大体反映了北北东走向的郯庐断裂构造型态。

关键词：大地热流地温梯度地温场渤海海域

Reservoir prediction using multi-wave seismic attributes

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Earthquake Science 2011年第4期24卷 373-389页

作者： Ye Yuan yang liu Jingyu Zhang {2. wei Tiansheng Chen state key {2. of {2. resources and prospecting China University of Petroleum Beijing 102249 China CNPC key laboratory of Geophysical {2. China University of Petroleum Beijing 102249 China petroleum Exploration and Production Research Institute SINOPEC Beijing 100083 China

The main problems in seismic attribute technology are the redundancy of data and the uncertainty of attributes, and these problems become much more serious in multi-wave seismic exploration. Data redundancy will increase the burden on interpreters, occupy large computer memory, take much more computing time, conceal the effective information, and especially cause the ＂curse of dimension＂. Uncertainty of attributes will reduce the accuracy of rebuilding the relationship between attributes and geological significance. In order to solve these problems, we study methods of principal component analysis （PCA）, independent component analysis （ICA） for attribute optimization and support vector machine （SVM） for reservoir prediction. We propose a flow chart of multi-wave seismic attribute process and further apply it to multi-wave seismic reservoir prediction. The processing results of real seismic data demonstrate that reservoir prediction based on combination of PP- and PS-wave attributes, compared with that based on traditional PP-wave attributes, can improve the prediction accuracy.

关键词： seismic attribute multi-wave exploration independent component analysis supportvector machine reservoir prediction

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歧口凹陷烷烃气碳、氢同位素特征及成因类型

天然气地球科学 2011年第6期22卷 1054-1063页

作者：国建英钟宁宁李剑王东良于学敏马卫中国石油大学(北京)油气资源与探测国家重点实验室北京102249 中国石油勘探开发研究院廊坊分院河北廊坊065007 中国石油大港油田勘探开发研究院天津大港300280

通过对天然气碳同位素、氢同位素和干燥系数关系的分析,划分歧口凹陷的烷烃类天然气成因类型,拓展研究区天然气勘探领域,明确今后勘探方向。歧口凹陷的烷烃类天然气包括生物气、生物—热成因混合气和热成因气3个大类,热成因气是凹陷的... 详细信息

通过对天然气碳同位素、氢同位素和干燥系数关系的分析,划分歧口凹陷的烷烃类天然气成因类型,拓展研究区天然气勘探领域,明确今后勘探方向。歧口凹陷的烷烃类天然气包括生物气、生物—热成因混合气和热成因气3个大类,热成因气是凹陷的主力天然气类型,其探明储量占总储量的95%以上。热成因气按母质类型又划分为陆相油型气和煤成气,油型气按成熟度分为低熟气、成熟气和高熟气,主要来自第三系湖相泥岩;埕海潜山天然气属于高熟煤成气,主要来自石炭系—二叠系煤系烃源岩。今后,歧口凹陷天然气勘探应坚持以中深层为主要层段,以潜山和深层碎屑岩为主要勘探领域,同时加强煤成气资源潜力的研究。

关键词：稳定同位素天然气成因类型歧口凹陷黄骅坳陷

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基于匹配追踪算法的时频滤波去噪方法

石油物探 2008年第4期47卷 367-371页

作者：赵天姿宋炜王尚旭中国石油大学(北京)油气资源与探测国家重点实验室北京102249

地震资料信噪比是影响地震资料质量的关键因素之一,目前的去噪方法大多难以保证在去噪的同时不损伤有效波。为此,提出了基于匹配追踪算法的时频滤波方法,该方法采用"减去"去噪方式,可以有效地去除噪声,且不损伤有效波。匹配追踪算法的... 详细信息

地震资料信噪比是影响地震资料质量的关键因素之一,目前的去噪方法大多难以保证在去噪的同时不损伤有效波。为此,提出了基于匹配追踪算法的时频滤波方法,该方法采用"减去"去噪方式,可以有效地去除噪声,且不损伤有效波。匹配追踪算法的基本原理是,将任意信号分解为波形的线性延展。而这些波形是从函数的冗余代码中选出,可以最佳匹配信号的结构。用选出的波形中代表有效信号的部分对信号进行重构,可以达到无损去噪的目的。分别利用匹配追踪时频滤波法和F-X滤波法对含有随机噪声的仿真信号进行了去噪处理,结果表明,匹配追踪时频滤波法可以较好地去除仿真信号中的随机噪声,降低对高频信号的损伤。

关键词：匹配追踪去噪时频滤波 F-X滤波

塔中北坡“复合花状”构造发育特征及成因机制

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地球科学 2018年第2期43卷 525-537页

作者：韩晓影汤良杰曹自成魏华动付晨阳中国石油大学油气资源与探测国家重点实验室北京102249 中国石油大学地球科学学院北京102249 中石化西北油田分公司勘探开发研究院新疆乌鲁木齐830011

学者们对塔中北坡走滑断层的活动期次和发育时间以及形成机制展开过一些研究,但尚未达成共识.近期高品质三维地震资料的获得,有助于对该区走滑断层展开更详细的研究.基于三维地震数据的解释,发现塔中北坡发育一系列下断穿寒武系基底、... 详细信息

学者们对塔中北坡走滑断层的活动期次和发育时间以及形成机制展开过一些研究,但尚未达成共识.近期高品质三维地震资料的获得,有助于对该区走滑断层展开更详细的研究.基于三维地震数据的解释,发现塔中北坡发育一系列下断穿寒武系基底、上断至中泥盆统的NNE向走滑断裂.地震剖面上显示多数走滑断裂几何学形态复杂,以上奥陶统为界,断裂呈现下部"正花状"与上部"负花状"相互叠置的"复合花状"构造样式.三维地震相干切片显示,下部断裂呈NNE向线性延伸且只分布于主位移带附近;上部断裂为NW走向,整体上呈现为右阶雁列排布.根据界面沿断层局部"隆升"高度的分析以及断层生长指数的计算可知,下部断层形成时间不早于晚奥陶世,上部雁列正断层的发育时间为中志留-中泥盆世.结合塔里木盆地周缘构造背景分析,认为下部基底断层可能发育于晚奥陶世,与古昆仑洋强烈俯冲碰撞作用相关;上部雁列断层的形成可能受控于下部基底走滑断层的活化,与阿尔金域强烈的褶皱造山作用相关.

关键词：走滑断层 “复合花状”构造线性构造雁列断层塔中北坡石油地质