Fast petroleum well drilling monitoring through optimum-path forest

Automatic inspection of petroleum well drilling has became paramount in the last years, mainly because of the crucial importance of saving time and operations during the drilling process in order to avoid some problems, such as the collapse of the well borehole walls. In this paper, we extended another work by proposing a fast petroleum well drilling monitoring through a modified version of the Optimum-Path Forest classifier. Given that the cutting's volume at the vibrating shale shaker can provide several information about drilling, we used computer vision techniques to extract texture informations from cutting images acquired by a digital camera. A collection of supervised classifiers were applied in order to allow comparisons about their accuracy and effciency. We used the Optimum-Path Forest (OPF), EOPF (Efficient OPF), Artificial Neural Network using Multilayer Perceptrons (ANN-MLP) Support Vector Machines (SVM), and a Bayesian Classifier (BC) to assess the robustness of our proposed schema for petroleum well drilling monitoring through cutting image analysis.

Geospatial analysis of groundwater depth for manual well drilling suitability in the Zinder Region, Niger

Manual and low-tech well drilling techniques have potential to assist in reaching the United Nations' millennium development goal for water in sub-Saharan Africa. This study used publicly available geospatial data in a regression tree analysis to predict groundwater depth in the Zinder region of Niger to identify suitable areas for manual well drilling. Regression trees were developed and tested on a database for 3681 wells in the Zinder region. A tree with 17 terminal leaves provided a range of ground water depth estimates that were appropriate for manual drilling, though much of the tree's complexity was associated with depths that were beyond manual methods. A natural log transformation of groundwater depth was tested to see if rescaling dataset variance would result in finer distinctions for regions of shallow groundwater. The RMSE for a log-transformed tree with only 10 terminal leaves was almost half that of the untransformed 17 leaf tree for groundwater depths less than 10 m. This analysis indicated important groundwater relationships for commonly available maps of geology, soils, elevation, and enhanced vegetation index from the MODIS satellite imaging system.

Study design for resource management decisions : OCS oil and gas development and the environment.

"October 1, 1978."

Irrigation wells and well drilling /

Mode of access: Internet.

Safeguarding workmen at oil derricks,

At head of title: ... Department of commerce. Herbert Hoover, secretary. Bureau of mines. Scott Turner, director.

Technology and labor in oil and gas, extraction and commercial banking.

Mode of access: Internet.

Proposed 1985 Outer Continental Shelf oil and gas lease sale offshore the south Atlantic states : OCS sale no. 90 : draft environmental impact statement /

"MMS 84-0007"--Cover.

Draft proposed program : 5-year outer continental shelf oil and gas leasing program for mid-1986 through mid-1991.

"March 1985."

A primer of oil well service and workover.

Mode of access: Internet.

Final environmental impact statement : proposed 1978 OCS oil and gas lease sale /

"OCS sale 45."

Proposed 1983 Outer Continental Shelf oil and gas lease sale offshore central California : OCS sale no. 73 /

Mode of access: Internet.

Final environmental statement : OCL sale no. 48 : proposed 1979 outer continental shelf oil and gas lease sale offshore Southern California /

Mode of access: Internet.

The design of offshore drilling structures.

"Paper no. 54-Pet-19 for presentation at the ninth annual Petroleum Mechanical Engineering Conference, Los Angeles, California September 27-29, 1954. American Society of Mechanical Engineers."

Proposed 1983 Outer Continental Shelf oil and gas lease sale offshore the Mid-Atlantic States : OCS sale no. 76 /

"December 1982"--Final.

Proposed environmental impact statement : proposed 1979 OCS oil and gas lease sale.

Cover title: Proposed 1979 Outer Continental Shelf oil and gas lease sale 58, western and central Gulf of Mexico.