The results have indicated that REE has the following characteristics of distribution:(1)from 4m to 7m of well depth,ΣREE changes frequently,(2)LREE/HREE ratio increases,and (3)relatively larger Ce negative anomaly takes place.

By means of drilling the well Wang 13, it is shown that in comparison with the same kind of wells drilled in recent years, the drilling speed increased by 16%,the drilling cycle reduced by 28%,the net drilling time raised by 32 21% and the maximum hole deviation was only 3 9° at the well depth of 3 425 m, obvious technical and economic benefits being achieved.

The well depth with Hemicyprinotus valvaetumidus and Australocypris in the northern margin of Qaidam basin is calibrated on the seismic line of 1182-1179-1199 in Saishiteng sag, providing a significant evidence for mapping the regional stratigraphic framework in this area.

The changing curves with the well depth for the quality fractions of H、C、O、Si、Ca、Fe、Mg、Al and the new C/O,new Ca/Si values are obtained,i. e. the logging curves.

This article first analyzes well drilling design content, including analyze and confirm the position of well drilling, the hydrous stratum structure analysis, the well depth and the well structure analysis, the strainer structure and padding structure analysis, well drilling structure drawing analysis;

2. According to the well logging requirement, the embedded system with 80C196,interface circuit,and the circuit of signal adjusting on the well depth and indicator diagram are designed.

When time sequence analysis method is used to establish prediction model of well depth, the seasonal time sequence values are first transformed into steady time sequence values by the differences in seasonal time sequence values followed by analysis of traditional F-test rank determination based on DDS method.

(J_(1y)) and Arhe Fm (J_(1a)). Based on the correlation of lithological and mineral features between this well and the Kuche depression and plant fossils, the depth from 4825m to 5039m in this well is identified as the Lower Jurassic Arhe Fm. , and also a brief discussion on the age of the fossil sporo-pollen assemblages found from this well depth is given.

The dependence of these results will be discussed as a function of quantum well depth and thickness.

The land area "weighed" by a geological lysimeter increaseswith formation depth and it is speculated that recordings made at oil well depth may allowdirect monitoring of subsurface water mass changes at the regional scale.

The small parameter δ=kT/V, which measures the ratio of the thermal energy to a typical well depth, is used in connection with the method of matched asymptotic expansion to obtained asymptotic approximations to all the eigenvalues and eigenfunctions.

The thickness of the nonsuperfluid layer as function of the substrate, however, increases monotonically with the well depth of the atom-substrate interaction potential.

An approximate description of the relationship between the substrate work function and the substrate adsorbate potential well depth D is given.

Based on the known interval velocities obtained from the lithologic log and sonic log, this paper presents a way of estimating the sand-shale ratio corresponding to the interval velocity at different well depths by using the Bayes formula of the probability theory. While the number of well increases, the regularity of the interval velocity varied with depth corresponding to the sand-shale ratio will speak for itself. This can be seen in the diagram of probability distribution of interval velocities...

Based on the known interval velocities obtained from the lithologic log and sonic log, this paper presents a way of estimating the sand-shale ratio corresponding to the interval velocity at different well depths by using the Bayes formula of the probability theory. While the number of well increases, the regularity of the interval velocity varied with depth corresponding to the sand-shale ratio will speak for itself. This can be seen in the diagram of probability distribution of interval velocities related to the sand-shale ratio. Therefore, the interval velocity curves drawn by equal sand-shale ratio from the diagram mentioned above, could thus be used as the template to estimate the sand-shale ratio by comparing it with the interval velocity curves obtained from seismic data,

A study on the pyrolytic chromatographic data of the various organic matter of continental origin from a deep well by means of a ROCK-EVAL equipment (a device for quick resolution of petroleum source rocks) obtains following concl- usions. 1.There are distinct differences on pyrolytic diagrams between the humic and sapropelic source rocks,i.e.,the former is mainly characterized by oxygen peak while the latter is dominated by hydrogen peak;but their evolution rules are the essentially same. 2.The depth of Han...

A study on the pyrolytic chromatographic data of the various organic matter of continental origin from a deep well by means of a ROCK-EVAL equipment (a device for quick resolution of petroleum source rocks) obtains following concl- usions. 1.There are distinct differences on pyrolytic diagrams between the humic and sapropelic source rocks,i.e.,the former is mainly characterized by oxygen peak while the latter is dominated by hydrogen peak;but their evolution rules are the essentially same. 2.The depth of Han 2 well is 6018m.The organic matters contained in for- mations penetrated by these wells from middle Miocene to Quaternary had underg- one a complete evolutionary process,i.e.,immature,mature and higher mature (wet gas).The critical point between liquid-gaseous phase is at a well depth of 5300m equivalent to a geothermal temperature of 180℃.The characteritics in each evolution stage can be observed clearly on the comprehensive diagram of pyrolytic parameters. 3.Different types of organic matters follows different evolution paths and resulted in different oil source potential as shown the pyrolytic parameter trian- gular and evolution diagram of source rock.On these diagrams,oil and gas gene- ration areas are divided,and cumulative oil yields of various source rocks can be calculated. 4.The evolution models on humic and sapropelic type source rocks are also given in this paper.

Based on the systematic sampling and analysis, the paleogeo-thermal conditions of the Mesozoic and Cenozoic in Jiyang Depression have been studied with kerogen vitrinite reflectance data. The logarithm of the vitrinite reflectance varied linear y with well depth for some researched wells. Simple geothermal histories were found in Mesozoic and Cenozoic groups separately no geothermal interruption and distortion existed. But in-between the two groups clear geothermal interruption was observed, which showed...

Based on the systematic sampling and analysis, the paleogeo-thermal conditions of the Mesozoic and Cenozoic in Jiyang Depression have been studied with kerogen vitrinite reflectance data. The logarithm of the vitrinite reflectance varied linear y with well depth for some researched wells. Simple geothermal histories were found in Mesozoic and Cenozoic groups separately no geothermal interruption and distortion existed. But in-between the two groups clear geothermal interruption was observed, which showed that Mesozoic group suffered denudation owing to crustal lift.