The shale of the upper Es4 formation (Es 4 u ), deposited during Eocene in Boxing Subsag Dongying Sag, is a typical set lime-rich lacustrine continental rift basin. Through logging data interpretation, core and thin section observations, geochemical elements [obtained by X radial fluorescence (XRF) mud logging] analysis, development controlling factors lithofacies cycles Es were analyzed. resul...

The identification of lithofacies from well is usually an interpretative process based on geophysical logs since core and sidewall samples are not usually available. Despite being always sampled and described, cuttings are useful only as a reference for determining the rocks because a number of problems occur during the drilling and sampling activities. Well logs are in situ continuous records ...

We have conducted an integrated study to investigate the petrophysical and geomechanical factors controlling the effectiveness of hydraulic fracturing (HF) in four subparallel horizontal wells in the Mississippi Limestone-Woodford Shale (MSSP-WDFD) play in Oklahoma. In two MSSP wells, the minimum horizontal stress Sh min indicated by the instantaneous shut-in pressures of the HF stages are sign...

Sediments of the Nezam-Abad area, south-east of Bam have been studied for the first time. Sedimentary facies are composed of thin-bedded clay, silt and fine grained sand interbedded with thin laminated limestone. Chemical analysis of X-Ray florescent indicates that more than 50% of sediments consist of silisium and aluminum oxide that can be used for reconstruction of environment. Ninety eight ...

Some major hydrocarbon-bearing basins are rich in shale with terrestrial facies China, which may provide abundant oil and gas resources. This work studied the Jurassic Lianggaoshan Formation Southeast Sichuan Basin of upper Yangtze Region. Core samples were chosen for total organic carbon content mineral composition analyses to classify lithofacies. Afterward, pore connectivity, wettability, mo...

this paper proposes an extension of markov chain model to characterize of geological formations and to make conditioning on any number of well data possible. in this study, lithofacies cycles of the amiran formation at type and pirshamsedin sections are examined by markov method and entropy analysis as well as field observations, and depositional environment has interpreted by proposed ideal se...

kashafrud formation, siliciclastic strata, middle jurassic in age, commences with basal fluvio conglomerates. the strata are described in terms of 3 facies association (conglomerate, sandstone and mudstone), which were deposited in a fluvio-deltaic and turbities environments. the basal kashafrud strata at 2 areas (8 sections), in the eastern kopet-dagh basin, consist predominantly of boulder to...