基准面

C油田储层可以划分为4个中期基准面旋回（S1&S4）、30个短期基准面旋回。

The reservoir can be divided into 4 medium-term base level cycles ( S1-S4 ) and 30 short-term base level cycles .

基准面变化在地震层序地层研究中的应用

Application of sedimentary base level in the study of seismic sequence stratigraphy

中期基准面H旋回内主要发育重力流水道。

Gravity flow channel develops during the middle-term H base-level cycle .

采用B样条函数曲面拟合法建立了两个相邻海域的理论深度基准面模型，再用多项式拟合法实现了两个海域的拼接。

B-spline function is used to construct models of lowest normal low water of two adjacent waters , then two models is spliced by polynomial fitting .

最常见的大地基准面是WGS84，这也是现在GPS系统所使用的基准面。

The most well-known is WGS84 used by the GPS systems today .

3用替换速度分别将接收点和炮点延拓到CMP位置的基准面；

Separate continuation of receiver point and shot point to datum of CMP position by replaced velocity ;

RG线的认识及时深转换的基准面问题

Knowledge of RG line and datum of time-depth conversion

最后通过统计全区1m以上砂体的平均厚度在各准层序（层）中的变化趋势来定量验证上述基准面变化曲线。

These curves are testified quantitatively by the varied tread of average thickness in sand body of over 1m .

实际上浮动基准面还是水平基准面，只是不同CMP的水平基准面高程可以变化。

Actually , floating datum is still horizontal datum , but the datum elevation of different CMP is variable .

在钠光源照射下，利用CCD摄像机采集芯片和基准面之间的等厚干涉条纹。

A sodium lamp illuminates the system , and the fringe patterns generated by the interference of the chip and the reference surface are captured by a CCD camera .

采用浮动基准面DMO叠加方法可以很好地解决这些问题。

We can solve these problems by using method of floating datum DMO superposition .

据此，将沙河街组三段划分为3个中期基准面旋回（C3，C2，C1）。

Therefore , 3rd member of Shahejie Formation can be divided into 3 middle basic level cycles ( C3 , C2 , C1 ) .

在基准面重建时，利用CRS运动学波场参数可将CRS叠加剖面校正到一选定的水平面上。

The CRS-stacked zero-offset section can be corrected ( redatumed ) to a given planar level by kinematic wave field attributes .

根据激光三角测距思想，确定了面阵CCD、激光发射器及铸坯基准面三者的空间关系，并建立了缺陷深度测量算法，完成了硬件系统的设计。

The measurement algorithm for defect depth was established base on the idea of laser triangulation range and key components spatial relations in system , according to the above theory a hardware system was designed .

同时，利用Cross的基准面旋回法、地层厚度法，将研究区山西组划分为2个长期旋回和6个中期旋回。

The characteristic of strata are discussed , meanwhile in the base-level cyclic sequences method of cross for major guiding ideology , using the method of stratum thickness , this paper divided Shanxi formation of study area into two long-term .

在波动方程基准面校正的基础上，波动方程叠前深度偏移的精度明显高于Kirchhoff偏移法的精度；

On the basis of wave equation datuming correction , the precision of wave equation prestack depth migration is distinctively higher than that of Kirchhoff migration ;

在这种情况下，RG线作为地震剖面解释的基准面是否合适值得探讨。

In that cases , it is worth to consider whether the RG line is suitable for datum of interpretation of seismic section .

针对多层轮廓线三维重构问题，研究了真三维复杂轮廓线的空间分布特征，通过引入参考基准面概念，提出了一种顾及局部平展特性的真三维TIN生成算法。

For the purpose of surface reconstruction from serial sectional contours , the spatial distribution characteristics of complicated serial sectional contours are analyzed , and an efficient algorithm is proposed for true three-dimensional TIN modelling concerning the reference plane .

河流相地层沉积环境特殊，难于用传统的地震层序分析方法来进行层序划分与解释，Cross分析基准面与成因地层形成的过程响应原理，是利用高分辨率地层方法来研究河流地层的理论基础。

It is difficult to divide and interpret the fluvial strata because its depositional environment is very special compared with others . The response principle between base level cycle and genetic strata developed by Cross is regarded as the basic theory for high-resolution stratigraphy applications in fluvial strata .

本文还给出了根据（静校正的）CMP基准面计算地表圆滑面的方法，统一了深度域中速度谱、时深转换和深度偏移的基准面。

A method for deriving the smoothed ground surface from CMP datum of static correction is given to form a common datum for velocity spectrum , time-depth conversion and depth migration in depth domain .

浮动基准面方法是将相对固定基准面的一份静校正量分解成两部分，并分别在动校正前、后应用的一种处理手段，这种分解是以CMP道集为单位的。

Floating datum method is divide the static of relative fixed datum into two parts that are applied to seismic data before and after NMO respectively and the division is done on CMP gather .

了解VSP资料和地面地震剖面在记录方式、基准面选择、低降速带校正方法以及资料处理过程是用好VSP资料、做好层位标定的前提。

Hence , to understand the record mode , datum-level selection , weathering and sub-weathering correction method and data processing of VSP data and seismic profile are prerequisites for well utilizing VSP data and horizon calibrations .

最后指出，层序Ⅰ的HST，层序Ⅱ的LST，层序Ⅲ的基准面上升体系域为本区最有利的油气勘探目标层段；

It is believed that the HST of sequence ⅰ, LST of sequence ⅱ and base-level ascending system tract of sequence ⅲ are the most favorable exploration targets in the study area .

这样，后续的叠加、速度分析、偏移成像及剖面的时深转换都可在这个基准面上进行，避免了以地表高程的平滑面代替CMP参考面的误差。

Like this , following stack ; velocity analysis ; migration imaging and time-depth conversion of section can all go forward in this datum , avoiding error result from smooth plane of surface elevation substituting CMP reference plane .

为弄清油田生产过程中遇到的问题和出现的矛盾，本次研究在垂向上把扶余油层原17小层细分为39个短期基准面旋回（SSC），对应于一个河道期。

In order to figure out questions and contradictions in the oil field production process , original 17 sublayers of Fuyu oil-bearing layer is vertically subdivided 39 short-scale cycle ( SSC ), which correspond to a channel stage .

合成记录理论试算的结果表明，用RRS方法求得的基准面静校正值误差一般只在±3ms之内，最大不超过±5ms。

The theoretical result of synthetic records show that the error of datum static correction value calculated using RRS is usually less than ± 3ms , seldom less than ± 5ms .

为此，RRS方法要求在一对控制点间计算5至10张共炮点记录的折射时差，再根据控制点数据对每个记录作线性校正求得每个桩号的基准面静校正值。

Hence , RRS method requires to calculate the refraction moveouts of 5 ~ 10 common-shot records between two adjacent control points , then computes datum static correction values of each receiver point by making linear correction of each record in light of control point data .

提出P13下切辫状水道形成于沉积基准面下降期，内部以冲刷充填结构为主，并识别出3-5级界面。

Pu-1-3 incised braided channel formed during the sea-level falling period , and formed erode and filling configuration , by which the 3 ~ ( th ) or 5 ~ ( th ) surfaces can be identified .

基准面旋回分析的结果表明，长6油层组位于K0～K5两个长期基准面半旋回的沉积转换面附近，顶部靠近区域盖层，底部与源岩直接接触；

Study indicates that Chang 6 locates between the K0 and K5 sediment transfer face of long-term base-level half cycles . The sand body develops . The top of the sandstone relies on the cap rock and the bottom contacts the source rock directly .

储集层主要发育在层序SQ1、SQ2、SQ3、SQ4和SQ5的基准面上升半旋回中，SB1、SB2、SB3、SB4和SB5层序界面可以作为油气横向运移的优势通道。

The reservoirs are mainly developed in the datum-rising hemicycles of these sequences as SQ_1 , SQ_2 , SQ_3 , SQ_4 and SQ_5 , and the sequence interfaces of SB_1 , SB_2 , SB_3 , SB_4 and SB_5 may be regarded as the dominant pathways of hydrocarbon lateral migration .