地层特性通常有很强的方位性,因此,必须进行三维测量才能提供完整的描述.三维声波,能提供轴向、周向、径向三个方向上的测井数据.轴向、周向的探测分辨率进一步提高,能更精细地描述近井眼地层信息;径向探测深度的提高,能更好地获取原状地层信息,在能为取心、射孔提供更准确依据的同时,还能有效地判断出地层断面及裂缝发育走向,并且也为声波过套管测井提供了可行性依据.

A new dipole data filtering method is mainly introduced and used the filtered data for anisotropic calculation.Frequency wave number domain coherent filtering method is mainly adopted for dipole data filtering,it greatly improves the quality of the dipole data,then based on very fast simulated annealing theory can be used the filtered data for anisotropic calculation.Finally the results are also compared with the results processed from eXpress software.It not only in good agreement but reduce the computation time.It is great significance.

Low-frequency Stoneley wave reflection in irregular borehole has been discussed.The essential physics of the low-frequency Stoneley waves are captured with a 1-D model.A mass-balance boundary condition and a propagator matrix are used to express Stoneley-wave interactions with the borehole irreeularities.The simulation results suggest that the borehole irreeularities can cause more distinguishing Stoneley-wave reflections than the elastic properties of formation.There is an important significance to the actual logging interpretation that should pay attention to the borehole irreeularities(washout),when using stoneley wave interpretation fracture.Comparing synthetic records with an actual field records,the fracture can be identifyed.

Introduced are the system composition and working principle of rotary sidewall coring tool.Designed is a kind of surface controlling software for the rotary sidewall coring tool,which can track GR or 0.4 m electrode in real time,locate core points accurately,and record pump pressure and other parameters during coring operation through time-driven approach.Analyzed are the realization of key technologies,such as coring depth location,alternative operation of depth drive and time drive,network communication and double buffering cartography.Practical application in Ren91 well in 2009 shows that its accuracy and instantaneity reach up to the designed demand and its operation is stable and reliable.

In the acoustic tools of petroleum exploration,the transmitter and receiver assembly is a weak section.The general design means is hard to calculate every weak section in detail.This paper introduces the means of adapting limited unit analysis design to logging tools machinery design.The limited unit analysis emulation can not only optimizes the machinery design,but also improves the application reliability and security.This provides a finer use for reference of limited unit analysis in the application of logging tools machinery.

For production logging, a single-core cable telemetry system is used for the data transmission from the downhole to surface computers. To meet the needs of a great deal of data transmission for imaging logging and integrated logging, a novel high-speed single-core cable telemetry transmission scheme is presented based on orthogonal frequency division multiplexing(OFDM)technique. It overcomes the inherent detects of single-core cable logging and improves frequency band efficiency. The scheme is a more ideal modulation and demodulation scheme for the high-speed data transmission of production logging. It can provide a help for the development of practical logging data transmission system.

文章介绍了将机械最优化设计应用到测井仪器推靠设计中的思路,分析了井径/微电极测井仪推靠装置的优化设计原理及过程,设计出的测井仪器空间结构紧凑合理,为其它推靠仪器的设计提供了借鉴.