Mud invasion causes decrement of both count rates,and the near one varies faster than the far one,but the gamma count rate will be changeless when the depth of invasion reaches 12 cm.
④The analysis of crossplot of P-wave impedance with natural gamma curve shows that the distribution of oil-bearing sandstone is in the area where both the value of natural gamma curve is bellow 55API and P-wave impedance is less than 8×106kg/m3·m/s.
Based on the plate of lithofacies, log factes and sedimentary factes, the fan-delta of the third member of the Shahejie Formation in Gaoshangpu oil field could be divided into 9 natural gamma curve shapes and assemblages (M), 8 rock types (N). This constitutes M/N type of log factes so as to demonstrate different kinds of sand bodies.
According to this changing,natural gamma curve in development logging can be not only rectified in depth,but also used in some fields such as interpretation of water-flooded zone,testing of water injection profile,channeling and leakage detection of oil wells or water wells and seek leakage etc.
The article introduces the development of the electronic circuits of minilog-caliper and the improvement of SCL-2 poteclinometer circuits, and analyses the spot application and the effect to the combination logging.
For $\gamma\in\mathbb{R}$ let $C(\gamma)$ be the set of all $f\in{\mathcal S}^\prime$ for which$\sum_{n=0}^{\infty}\,|(f,h_n)|\,(n+1)^{\gamma}>amp;lt;\infty$, where $(h_n)_{n=0,1,\dots}$ is the orthonormal base of Hermite functions.
Using these results we give an explicit solution of the problem of optimal reconstruction of functions from Sobolev's classes $W^{\gamma}_{p}(M^{d})$ in $L_{q}(M^{d}), 1 \leq q \leq p \leq \infty$.
This result generalizes the characterization of Fourier series of distributions with a distributional point value given in [5] by $\lim_{x\rightarrow\infty}\sum_{-x\leq n\leq ax}a_{n}e^{inx_{0}}=\gamma\ (\mathrm{C},k)\,$.
In asymmetric fusion, donor calli were treated with gamma ray at a dose of 40, 60, 80 Gy (1.3 Gy/min) respectively and then used to isolate protoplasts.
Eesponse of the inner magnetosphere and the ionosphere of middle and low latitudes to Bz variations of the interplanetary magnetic field is studied. It is pointed out that variations of the large-seale convective electric field in the magnetosphere arising from Bz variations will penetrate into the inner magnetosphere, and then map into the middle-low latitude ionosphere along magnetic field lines, producing a characteristic electric field and current system, which will distort the Sq current system and pro...
A true value of rock can be obtained from the well-logging signals by signal processing.This is the invertibility of the logging signals.It has been proved the invertibility when the logging signals were a output from a convolute system of it can be modeled by the Autozegressive and Moving-Average mode with a invertibility in this paper.It has introduced 2 lemmas and methods that have restored the rock signals from the logging signals:first is a deconvolution,second is a inverse function of the mode ARMA Wh...
The application of adjoint Monte-Carlo method to natural γ-ray spectrumlogging,was studied theoretically. The relationship between adjoint Monte-Carlo method andthe computation of natural γ-ray spectrum flux is established. The probability of orientation toenergy method is proposed. Analog computation of production case was performed, and acomparison of results of Monte Carlo method with those of adjoint Monte Carlo method wasmade. Theoretical study and the analog computation results showed that in the cas...
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