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Search Petrowiki: Pages with reference errors
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- Information Technology > Knowledge Management (0.40)
- Information Technology > Communications > Collaboration (0.40)
...y) of the evaluation.Table 1 summarizes the typical evaluation program choices and can be used as a reference during subsequent discussions on determination of various reservoir properties. * Table 1 This w...ter-saturation determination * Permeability determination Applying petrophysical techniques The pages linked above will acquaint the reader with the various aspects of the quantitative petrophysical de...ing well logs, these are both assumed to be constant, and those assumptions can lead to significant errors in the calculatedSw values. The Sw calculations from the resistivity logs and the various Archie pa...
- Reservoir Description and Dynamics > Reserves Evaluation > Estimates of resource in place (1.00)
- Reservoir Description and Dynamics > Formation Evaluation & Management > Open hole/cased hole log analysis (1.00)
- Reservoir Description and Dynamics > Formation Evaluation & Management > Core analysis (0.98)
- Reservoir Description and Dynamics > Reservoir Characterization > Exploration, development, structural geology (0.73)
- Information Technology > Knowledge Management (0.50)
- Information Technology > Communications > Collaboration (0.50)
...llhead. Tool face quantifies the direction in which the tool is pointing. It is the angle between a reference direction on a downhole tool and a fixed ...reference in space. For near-vertical wells, the fixed ...reference is magnetic north and the (magnetic) tool face is the angle between magnetic north and the projecti...
With the growth in drilling deviated, extended-reach, and horizontal wells, the location of the wellbore is increasingly a 3D problem. It is encountered in one of two situations: to direct and define the trajectory of the well during the drilling process (geosteering) or to characterize the well path after drilling. The former has contributed to huge increases in well productivity. The latter is a vital element of integrated reservoir studies in which the aim is to generate a 3D model of the reservoir based on correct well locations. This discussion is set within the context of the latter.
- Europe (0.92)
- Asia (0.92)
- North America > United States > Texas (0.68)
- Geology > Geological Subdiscipline > Stratigraphy (1.00)
- Geology > Geological Subdiscipline > Geomechanics (0.92)
- Geology > Rock Type > Sedimentary Rock > Clastic Rock (0.67)
- Geophysics > Seismic Surveying > Borehole Seismic Surveying (1.00)
- Geophysics > Magnetic Surveying (1.00)
- Geophysics > Gravity Surveying > Gravity Acquisition (1.00)
- Geophysics > Borehole Geophysics (1.00)
- Europe > France > Paris Basin (0.99)
- Africa > Gabon > Rabi Kounga Field (0.99)
- Well Drilling > Wellbore Design > Wellbore integrity (1.00)
- Well Drilling > Well Planning > Trajectory design (1.00)
- Well Drilling > Drilling Operations > Directional drilling (1.00)
- (8 more...)
... the tube bore is stretched, causing a change in the wire resistance. Another two sets of wire--the reference, or "passive," windings--are wrapped on the upper part of the tube, which is not exposed to pressur...ign has been in use since the early 1970s. It features a two-crystal arrangement of a measure and a reference crystal. The measure crystal is exposed to both pressure and temperature. The ...reference crystal is exposed only to temperature and is used to compensate for temperature effects on the mea...
The practice of using bottomhole pressure measurements to improve oil and gas production and solve problems of reservoir engineering began around 1930. Initially, pressures were calculated using fluid levels; a later method was to inject gas into the tubing until the pressure became constant. The earliest bottomhole pressure measurements were made with one-time-reading pressure bombs and maximum-indicating or maximum-recording pressure gauges that lacked the accuracy, reliability, or durability of present-day technology. The varied uses of bottomhole pressure and temperature measurements have increased in scope during the past two decades as instrumentation technologies have produced more reliable and accurate tools. These advances have made more applications possible, including use in multilayer reservoirs, horizontal wells, interference testing, and drawdown test interpretation. This chapter is focused mainly on the types of measurements made and the tools available.
- Europe (0.67)
- North America > United States > Texas (0.28)
...r case is exactly what we need for these calculations, but the reader is directed to a gas dynamics reference for additional depth of understanding of this problem.[1] If we assume a linearly varying density a...
The three primary functions of a drilling fluid--the transport of cuttings out of the wellbore, prevention of fluid influx, and the maintenance of wellbore stability--depend on the flow of drilling fluids and the pressures associated with that flow. For example, if the wellbore pressure exceeds the fracture pressure, fluids will be lost to the formation. If the wellbore pressure falls below the pore pressure, fluids will flow into the wellbore, perhaps causing a blowout. It is clear that accurate wellbore pressure prediction is necessary. To properly engineer a drilling fluid system, it is necessary to be able to predict pressures and flows of fluids in the wellbore. The purpose of this chapter is to describe in detail the calculations necessary to predict the flow performance of various drilling fluids for the variety of operations used in drilling and completing a well.
- North America > United States > Texas (0.92)
- North America > Canada (0.92)
- North America > United States > Oklahoma (0.68)
- North America > United States > Texas > Permian Basin > Yeso Formation (0.99)
- North America > United States > Texas > Permian Basin > Yates Formation (0.99)
- North America > United States > Texas > Permian Basin > Wolfcamp Formation (0.99)
- (25 more...)
- Well Drilling > Wellbore Design > Wellbore integrity (1.00)
- Well Drilling > Well Planning > Trajectory design (1.00)
- Well Drilling > Pressure Management > Well control (1.00)
- (8 more...)
- Information Technology > Knowledge Management (0.40)
- Information Technology > Communications > Collaboration (0.40)
...e index of the 1,727-page, 1989 printing of thePetroleum Engineering Handbook[8] contained only one reference to "risk [factor]" in an article about property evaluation. Much of the early Monte Carlo simulati...ons to the histogram is the "chi-square" value, which is obtained by summing the normalized squared errors. ...(10.5) where hi is the height of the histogram, and yi is the height (y -val...* Average porosity over a given structure. Normal distributions are also used to characterize: * Errors in measurement (temperature and pressure). * People's heights. * Time to complete simple activiti...
The oil and gas industry invests money and other resources in projects with highly uncertain outcomes. We drill complex wells and build gas plants, refineries, platforms, and pipelines where costly problems can occur and where associated revenues might be disappointing. We may lose our investment; we may make a handsome profit. We are in a risky business. Assessing the outcomes, assigning probabilities of occurrence and associated values, is how we analyze and prepare to manage risk.
- Europe > United Kingdom (1.00)
- North America > United States > Texas (0.94)
- Asia > Middle East (0.92)
- South America (0.67)
- Research Report > Experimental Study (0.67)
- Overview (0.67)
- Research Report > New Finding (0.45)
- South America > Venezuela (0.99)
- Europe > United Kingdom > North Sea > Northern North Sea > Brent Formation (0.99)
- Asia > Middle East > Turkey > Zonguldak Basin (0.99)
- Africa > Cameroon > Gulf of Guinea > Rio Del Ray Basin > Etinde Block > IF Field (0.99)