珠江口盆地新近系地层岩性圈闭形成条件及发育规律分析

伴随勘探程度的提高,地层岩性圈闭已经成为珠江口盆地油气勘探的重要新领域。为此,对珠江口盆地新近系这一主力含油层段进行了地层岩性圈闭形成条件和发育规律的分析。认为盆地新近纪以来多期次的海平面升降旋回,多种沉积体系的共同发育,2种类型坡折及其对应的低位体,以及2次构造运动为地层岩性圈闭的发育创造了十分有利的条件。在上述条件的综合作用下,地层岩性圈闭的发育呈现出陆架区、坡折区各具特色、层序界面附近层段最为有利、油气运移通道是成藏主控因素等规律性特征。

JX1-1油田沙河街储层注入水与储层配伍性研究

针对JX1-1油田注水井出现注水阻抗明显上升,吸水能力递减快的问题,进行了储层敏感性实验研究、注入水和地层水静态和动态配伍性研究,注入水(固相颗粒、悬浮油)单独和共同作用与储层的动态配伍性实验研究。实验结果表明,水敏性中等偏强是储层欠注内在因素;清污混合回注过程中结钙质垢也是损害储层的因素之一。另外,一关键因素是注水水质中悬浮物质含量超标对吸水层造成的伤害,建议控制JX1-1油田沙河街储层注入水指标为:ρ(油)≤10mg/L;ρ(悬浮物)≤3mg/L;悬浮物颗粒粒径中值d≤3μm。

Application of four-component dipole shear reflection imaging to interpret the geological structure around a deviated well

Acoustic reflection imaging in deep water wells is a new application scope for offshore hydrocarbon exploration.Two-dimensional(2 D)geological structure images can be obtained away from a one-dimensional(1 D)borehole using single-well acoustic reflection imaging.Based on the directivity of dipole source and four-component dipole data,one can achieve the azimuth detection and the three-dimensional(3 D)structural information around the wellbore can be obtained.We first perform matrix rotation on the field fourcomponent data.Then,a series of processing steps are applied to the rotated dipole data to obtain the reflector image.According to the above dipole shear-wave imaging principle,we used four-component cross-dipole logging data from a deviated well in the South China Sea to image geological structures within 50 m of a deviated well,which can delineate the structural configuration and determine its orientation.The configuration of near-borehole bedding boundaries and fault structures from shear-wave imaging results agrees with those from the Inline and Xline seismic profiles of the study area.In addition,the configuration and orientation of the fault structure images are consistent with regional stress maps and the results of the borehole stress anisotropy analysis.Furthermore,the dip azimuth of the bedding boundary images was determined using borehole wall resistivity data.Results of this study indicate that integrating borehole acoustic reflection with seismic imaging not only fills the gap between the two measurement scales but also accurately delineates geological structures in the borehole vicinity.

Multisource least-squares reverse-time migration with structure-oriented filtering

The technology of simultaneous-source acquisition of seismic data excited by several sources can significantly improve the data collection efficiency. However, direct imaging of simultaneous-source data or blended data may introduce crosstalk noise and affect the imaging quality. To address this problem, we introduce a structure-oriented filtering operator as preconditioner into the multisource least-squares reverse-time migration （LSRTM）. The structure-oriented filtering operator is a nonstationary filter along structural trends that suppresses crosstalk noise while maintaining structural information. The proposed method uses the conjugate-gradient method to minimize the mismatch between predicted and observed data, while effectively attenuating the interference noise caused by exciting several sources simultaneously. Numerical experiments using synthetic data suggest that the proposed method can suppress the crosstalk noise and produce highly accurate images.

Simulation logging experiment and interpretation model of array production logging measurements in a horizontal well

The distributions of local velocity and local phase holdup along the radial direction of pipes are complicated because of gravity differentiation,and the distribution of fluid velocity fi eld changes along the gravity direction in horizontal wells.Therefore,measuring the mixture flow and water holdup is difficult,resulting in poor interpretation accuracy of the production logging output profile.In this paper,oil–water two-phase flow dynamic simulation logging experiments in horizontal oil–water two-phase fl ow simulation wells were conducted using the Multiple Array Production Suite,which comprises a capacitance array tool(CAT)and a spinner array tool(SAT),and then the response characteristics of SAT and CAT in diff erent fl ow rates and water cut production conditions were studied.According to the response characteristics of CAT in diff erent water holdup ranges,interpolation imaging along the wellbore section determines the water holdup distribution,and then,the oil–water two-phase velocity fi eld in the fl ow section was reconstructed on the basis of the fl ow section water holdup distribution and the logging value of SAT and combined with the rheological equation of viscous fl uid,and the calculation method of the oil–water partial phase fl ow rate in the fl ow section was proposed.This new approach was applied in the experiment data calculations,and the results are basically consistent with the experimental data.The total fl ow rate and water holdup from the calculation are in agreement with the set values in the experiment,suggesting that the method has high accuracy.

设备状态监测系统在海上采油平台的应用研究

油气田连续生产,要求大型机组可靠性高、使用寿命长、经济效益好,对透平式流体动力机械进行状态实时监测。每年设备故障不断发生,保证设备安全平稳运行,是油气田全生产要面对的问题。介绍海上平台的状态监测系统及海上透平机组典型故障,强化专业知识培训提升维保质量,提升故障分析判定水平,对下一步的维修计划制定提供可靠依据。

利用银企直连系统提升集团企业资金管理

随着集团企业业务的快速发展，国际化步伐的迈出，以信息化手段提升集团资金集中管理的需求越来月迫切，很多企业在资金管理方面纷纷实现了系统与软件化，尤其是大型集团企业。运用资金管理系统后，人力成本降低，资金管理效率得到提高。但是，因资金系统无法和合作银行的网银系统有效地对接，资金人员必须不断地在各个银行网银和资金系统间切换，由此容易导致误操作，且耽误时间、浪费精力。很多集团企业因此采用银企直连系统来实现银行和企业的资金管理系统之间的对接。本文通过对银企直连系统的实施为企业带来的效益进行分析，针对银企直连系统的特点及其可以解决问题还有应用时应注意的问题进行了一些简单地分析。

Least-squares reverse time migration method using the factorization of the Hessian matrix

Least-squares reverse time migration(LSRTM)can eliminate imaging artifacts in an iterative way based on the concept of inversion,and it can restore imaging amplitude step by step.LSRTM can provide a high-resolution migration section and can be applied to irregular and poor-quality seismic data and achieve good results.Steeply dipping refl ectors and complex faults are imaged by using wavefi eld extrapolation based on a two-way wave equation.However,the high computational cost limits the method’s application in practice.A fast approach to realize LSRTM in the imaging domain is provided in this paper to reduce the computational cost signifi cantly and enhance its computational effi ciency.The method uses the Kronecker decomposition algorithm to estimate the Hessian matrix.A low-rank matrix can be used to calculate the Kronecker factor,which involves the calculation of Green’s function at the source and receiver point.The approach also avoids the direct construction of the whole Hessian matrix.Factorization-based LSRTM calculates the production of low-rank matrices instead of repeatedly calculating migration and demigration.Unlike traditional LSRTM,factorization-based LSRTM can reduce calculation costs considerably while maintaining comparable imaging quality.While having the same imaging eff ect,factorization-based LSRTM consumes half the running time of conventional LSRTM.In this regard,the application of factorization-based LSRTM has a promising advantage in reducing the computational cost.Ambient noise caused by this method can be removed by applying a commonly used fi ltering method without signifi cantly degrading the imaging quality.

Linear inversion-imaging method based on joint primary refl ected waves and surface-related multiples

In marine seismic exploration,especially in deep-water and hard ocean-bottom cases,free-surface multiples are strongly developed.Compared with primary waves,the wider illumination aperture of the multiples is beneficial for high-resolution seismic imaging.In this study,by introducing a new compound source composed of primaries and free-surface multiples and by ignoring internal multiples,we derive a new linearized forward problem(free-surface-multiple prediction model)under a weak-scattering assumption(i.e.,first-order Born approximation).On the basis of the new linearized problem,we propose a joint inversion-imaging method by simultaneously using the primaries and free-surface multiples under the general framework of least square inversion.To eliminate the crosstalk artifacts introduced by the cross-correlation of multiples with different orders,we prove that the crosstalk artifacts can be gradually eliminated during the inversion if a proper step length is selected.Synthetic-andfield-data tests demonstrate the effectiveness of the proposed method.

教育防控督查惩戒国有企业纪检监察工作的思路创新和实践

纪检监察工作是加强企业管理，提高经济效益和社会效益的重要手段，是建立现代企业制度，完善企业监督体系的必然要求，是企业党的建设的重要内容和现代企业管理的重要组成部分，它贯穿于企业管理全过程。如何在国有企业的改革发展中，发挥纪检监察的监督和保障作用，关系着国有企业健康发展，关系着企业大局的稳定。中海石油（中国）有限公司湛江分公司（以下简称湛江分公司或公司）纪检监察工作从员工个体与公司整体两个维度出发，强化“思想教育、预防控制、监督检查、违纪惩戒”四个层面的工作，促进员工廉洁从业、企业合规运营，保障和促进企业健康快速发展。

探究工程建设招投标中存在的问题及解决措施

伴随着市场经济的近一步改革，我国经济发展水平到了一个更高的层次，人们的生活水平也得到了很大的提高。随着我国经济的发展，工程建设的招投标成为了社会关注的热点。本文将从我国工程建设招投标的现状和问题，研究工程建设招投标的意义和作用以及如何公平、公正的进行招投标来进行阐述。

西沙/南沙钻井可行性与生物礁成因和储层的特征

笔者围绕南海深水盆地生物礁成因与储层特征和南沙没有中国一口石油钻井的战略性基础性公益性课题，全面系统地收集历史钻井、地质调查与科研成果资料，实施建国以来最大规模西沙群岛科学考察，解释分析中建南盆地二维地震最新测线和生物礁赋存分布的规律，系统研究西沙-南海钻井可行性、生物礁成因与油气储层的特征，设计钻穿西沙群岛生物礁科学探测井——西科1井，石岛风成生物礁西石2井，并为2014年中建南盆地981钻井做出贡献。