POROSITY FROM DENSITY LOG

فهرست عناوین اصلی در این پاورپوینت

فهرست عناوین اصلی در این پاورپوینت

● OPENHOLE LOG EVALUATION
● POROSITY LOG TYPES
● DENSITY LOGS
● DENSITY LOG
● BULK DENSITY
● POROSITY FROM DENSITY LOG
● DENSITY LOGS
● BULK DENSITY LOG
● NEUTRON LOG
● POROSITY FROM NEUTRON LOG
● COMMON LITHOLOGY MATRIX
TRAVEL TIMES USED
● ACOUSTIC (SONIC) LOG
● SONIC LOG
● EXAMPLE

Calculating Rock Porosity
Using an Acoustic Log
● EXAMPLE SOLUTION SONIC LOG
● FACTORS AFFECTING SONIC
LOG RESPONSE
● RESPONSES OF POROSITY LOGS
● GAS EFFECT
● ESTIMATING POROSITY FROM
WELL LOGS
● GEOLOGICAL AND PETROPHYSICAL DATA USED TO DEFINE FLOW UNITS


نوع زبان: انگلیسی حجم: 0.78 مگا بایت
نوع فایل: اسلاید پاورپوینت تعداد اسلایدها: 35 صفحه
سطح مطلب: نامشخص پسوند فایل: ppt
گروه موضوعی: زمان استخراج مطلب: 2019/06/15 11:11:18

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عبارات مهم استفاده شده در این مطلب

عبارات مهم استفاده شده در این مطلب

density, ., log, porosity, g, formation, mud, bulk, cm۳, fluid, f, component,

توجه: این مطلب در تاریخ 2019/06/15 11:11:18 به صورت خودکار از فضای وب آشکار توسط موتور جستجوی پاورپوینت جمع آوری شده است و در صورت اعلام عدم رضایت تهیه کننده ی آن، طبق قوانین سایت از روی وب گاه حذف خواهد شد. این مطلب از وب سایت زیر استخراج شده است و مسئولیت انتشار آن با منبع اصلی است.

http://www.ux.uis.no/~s-skj/ResTek1-v03/Notater/Tamu.Lecture.Notes/Porosity/Lecture_04.ppt

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عبارات پرتکرار و مهم در این اسلاید عبارتند از: density, ., log, porosity, g, formation, mud, bulk, cm۳, fluid, f, component,

مشاهده محتوای متنیِ این اسلاید ppt

مشاهده محتوای متنیِ این اسلاید ppt

porosity determination from logs most slides in this section are modified primarily from next perf short course notes ۱۹۹۹. however many of the next slides appears to have been obtained from other primary sources that are not cited. some slides have a notes section. openhole log evaluation this figure depicts the basic setup of the logging process. a wireline truck with a spool of logging cable is setup so that the sonde measuring equipment can be lowered into the wellbore. the logging tools measure different properties such as spontaneous potential and formation resistivity as the sonde is brought to the surface. the information is processed by a computer in the logging vehicle and is interpreted by an engineer or geologist. oil sand porosity determination by logging an engineer or geologist can interpret the log readings to reach certain conclusions about the formation. for example a decrease in radioactivity from the gamma ray log could indicate the presence of a sandstone formation. an increase in resistivity may indicate the presence of hydrocarbons. and an increase in a porosity log might indicate that the formation has porosity and is permeable. porosity log types ۳ main log types bulk density sonic acoustic compensated neutron these logs do not measures porosity directly. to accurately calculate porosity the analyst must know formation lithology fluid in pores of sampled reservoir volume . density logs uses radioactive source to generate gamma rays gamma ray collides with electrons in formation losing energy detector measures intensity of back scattered gamma rays which is related to electron density of the formation electron density is a measure of bulk density density logs bulk density b is dependent upon lithology porosity density and saturation of fluids in pores saturation is fraction of pore volume occupied by a particular fluid intensive density log formation b mud cake mc hmc to minimize the influence of the mud column the source and detector mounted on a skid are shielded. the openings of the shields are applied against the wall of the borehole by means of an eccentering arm. the force exerted is substantial and the skid has a plow shaped leading edge. therefore it is able to cut through soft mud cakes usually encountered at medium and shallow depths. some mud cake may remain however and is seen by the tool as part of the formation. this must be accounted for. a correction is needed when the contact between the skid and the formations is not perfect due to mud cake or roughness of the borehole wall . in unfavorable cases this correction can be fairly large. if only one detector is used the correction is not easy to determine as it depends on the thickness the weight and even the composition of the mud cake or mud interposed between the skid and formation. using two detectors a correction can be made for unfavorable conditions. bulk density measures electron density of a formation strong function of formation bulk density matrix bulk density varies with lithology sandstone ۲.۶۵ g cc limestone ۲.۷۱ g cc dolomite ۲.۸۷ g cc porosity from density log porosity equation fluid density equation we usually assume the fluid density f is between ۱. and ۱.۱. if gas is present the actual f will be ۱. and the calculated porosity will be too high. mf is the mud filtrate density g cc h is the hydrocarbon density g cc sxo is the saturation of the flush zone decimal we usually assume the fluid density f is between ۱. and ۱.۱. if gas is present the actual f will be ۱. and the calculated porosity will be too high. mf is the mud filtrate density g cc h is the hydrocarbon density g cc sxo is the saturation of the flush zone decimal the bulk density log is a pad device. this means that the log must be in constant contact with the borehole wall. this is accomplished through the use of a caliper arm on the back side of the density device. when the pad loses contact with the formation either through rugosity or washouts the bulk density reading is affected. the reading from the density log is always too low in the presence of rugosity or washout. this results in a calculated porosity that is much too high because the density log is reading in essence the porosity of the washout or the gap between the porosity pad and the borehole wall. although density logs are compensated for the presence of mudcake this compensation is often inadequate to account for all of the effects of borehole breakouts washouts and rugosity. density logs working equation hydrocarbon zone b recorded parameter bulk volume  sxo mf mud filtrate component  ۱ sxo hc hydrocarbon component vsh sh shale component ۱  vsh matrix component b recorded parameter bulk volume  sxo mf mud filtrate component  ۱ sxo hc hydrocarbon component vsh sh shale component ۱  vsh matrix component density logs if minimal shale vsh  if hc  mf  f then b  f ۱  ma d porosity from density log fraction ma density of formation matrix g cm۳ b bulk density from log measurement g cm۳ f density of fluid in rock pores g cm۳ hc density of hydrocarbons in rock pores g cm۳ mf density of mud filtrate g cm۳ sh density of shale g cm۳ vsh volume of shale fraction sxo mud filtrate saturation in zone invaded by mud filtrate fraction d porosity from density log fraction ma density of formation matrix g cm۳ b bulk density from log measurement g cm۳ f density of fluid in rock pores g cm۳ hc density of …

کلمات کلیدی پرکاربرد در این اسلاید پاورپوینت: density, ., log, porosity, g, formation, mud, bulk, cm۳, fluid, f, component,

این فایل پاورپوینت شامل 35 اسلاید و به زبان انگلیسی و حجم آن 0.78 مگا بایت است. نوع قالب فایل ppt بوده که با این لینک قابل دانلود است. این مطلب برگرفته از سایت زیر است و مسئولیت انتشار آن با منبع اصلی می باشد که در تاریخ 2019/06/15 11:11:18 استخراج شده است.

http://www.ux.uis.no/~s-skj/ResTek1-v03/Notater/Tamu.Lecture.Notes/Porosity/Lecture_04.ppt

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