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Fluid levels in the Oxnard Oil Field, Ventura County, California The U.S. Geological Survey (USGS), in cooperation with the California State Water Resources Control Board (SWRCB), compiled Fall 2017 fluid level elevation data from idle oil and gas wells in the Oxnard Oil Field to estimate vertical hydraulic head difference between oil production and overlying groundwater aquifer zones. Fluid elevations came from two sources, measurements in idle oil and gas wells and groundwater elevations in water wells in the overlying aquifer estimated at the points of idle well measurements using geographic information system (GIS) procedures. The fluid elevations from idle oil and gas wells were compiled by the California Geologic Energy Management Division (CalGEM) as part of their Idle... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: California, Energy Resources, Hydrology, Oxnard, USGS Science Data Catalog (SDC), All tags... Water Quality, Water Resources, groundwater level, oil and gas, Fewer tags Geophysical, geological, hydrological, and geochemical data for aquifer salinity mapping in the Elk Hills, Buena Vista, and Coles Levee Oil Fields, Kern County, California The U.S. Geological Survey (USGS) in cooperation with the California State Water Resources Control Board (State Water Board) compiled and analyzed data for mapping groundwater salinity, characterizing aquifer systems, and documenting the effects of oil field water injection in the Elk Hills Elk Hills, Buena Vista, and Coles Levee Oil Fields, San Joaquin Valley, California. Data provided in this data release include borehole geophysical data, geochemical analyses of water samples, hydrologic data, geological formation depths, and information on observed well log resistivity anomalies—interpreted to be from injection for disposal of produced water from oil wells or from natural causes. The data reported here were... Categories: Data; Tags: California, Elk Hills, Energy Resources, Geochemistry, Geophysics, All tags... Hydrology, San Joaquin Basin, Stratigraphy, USGS Science Data Catalog (SDC), Water Quality, Water Resources, borehole geophysics, geologic formations, groundwater, groundwater level, groundwater quality, inlandWaters, produced water disposal, Fewer tags Idle well fluid measurements for oil and gas wells in California This dataset consists of 119,494 lines of data consisting of idle well fluid level depth, auxiliary measurements, and well parameters from California oil and gas wells that were reported to the California Department of Conservation, Geologic Energy Management Division (CalGEM). The dataset was provided by CalGEM in March 2018 and includes measurements made from 1976 to 2018. There are 5 sets of operator-reported data: idle well fluid level depth (N=101,734), well clean out depth (N=8,402), depth of base of fresh water (N=108,216), well top perforation depth (N=93,569), and depth reached (N=15,756). These are associated with a well, defined by API number, well number, operator name, test date, township, section,... Categories: Data; Tags: California, Energy Resources, Hydrology, Stratigraphy, USGS Science Data Catalog (SDC), All tags... Water Quality, Water Resources, base of fresh water, environment, geoscientificInformation, idle well fluid levels, oil and gas, society, top perforation, Fewer tags Groundwater elevation data and models in and around select California oil fields (ver. 2.0, May 2024) This data release contains groundwater elevation data and the associated model/code used to create groundwater elevation surfaces in and around select oil fields in California. The data and model provided here are intended to supplement interpretative manuscripts. Specific study areas will be added as Child Items found in this data release. Groundwater elevations are usually collected from individual wells at discrete times. However, we are often interested in looking at a continuous surface of groundwater levels for a variety of reasons including to examine potential gradients, or directions of groundwater flow. Therefore, we created continuous space-time models of groundwater elevations using a Gaussian process.... Categories: Data Release - Revised; Tags: California, Gaussian processes, USGS Science Data Catalog (SDC), groundwater levels, idle wells, All tags... oil and gas, Fewer tags Geophysical and geological data for select petroleum wells in North Coles Levee Oil Field, Kern County, California This dataset includes geological and geophysical data from petroleum wells located in the North Coles Levee Oil Field, Kern County, California. The purpose of this dataset is to describe groundwater salinity trends and the related geological controls. These data are used in an interpretive manuscript that characterizes a salinity inversion (lower-salinities found below higher-salinities) in North Coles Levee Oil Field. The geophysical data were primarily extracted by selecting data points from scanned well logs; however, some of these logs were digitized in their entirety. The geological data were extracted by interpreting select geologic formations from geophysical well logs relevant to the accompanying manuscript.... Tags: California, Geochemistry, Geophysics, Hydrology, North Coles Levee, All tags... San Joaquin Valley, Stratigraphy, USGS Science Data Catalog (SDC), Water Quality, Water Resources, biota, borehole geophysics, geologic formations, groundwater, groundwater quality, Fewer tags Geophysical and geochemical data for salinity mapping in the Midway-Sunset oil field area The U.S. Geological Survey (USGS) and California State University-Sacramento, in cooperation with the California State Water Resources Control Board and U.S. Bureau of Land Management, compiled and analyzed data for mapping groundwater salinity in selected oil and gas fields in California. The data for the Midway-Sunset (MWSS) oil field includes digitized borehole geophysical data, geochemical analyses of produced water samples from oil and gas wells, core sample analysis from select wells, and groundwater total dissolved solids (TDS) estimations with the related geophysical log data. These data have been compiled from many sources and span several decades. The geochemical data include ion concentrations and TDS... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Borehole geophysics, California, Enhanced Oil Recovery, Geochemistry, Geochemistry, All tags... Geophysics, Groundwater salinity, Hydrogeology, Kern County, Midway-Sunset, Oil and gas, San Joaquin Valley, USGS Science Data Catalog (SDC), Water Quality, Water Resources, Fewer tags Mud logs from the Oxnard Oil Field, Ventura County, California The U.S. Geological Survey (USGS) in cooperation with the California State Water Resources Control Board (SWRCB) compiled and digitized mud logs from oil and gas wells in the Oxnard Oil Field area. Scanned copies of the mud logs were downloaded from the California Geologic Energy Management Division (CalGEM) online data and were digitized. Thirteen available mud logs associated with the Pliocene Tar Sand pool code (Vaca Tar Sand) were digitized. Mud-logging technology (mud logs) allows for identification and relative concentration measurement in parts per million by volume (ppmv) of light hydrocarbon gases (methane through pentane) occurring in drilling mud returned to the surface throughout the drilling process... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: California, Energy Resources, Geochemistry, Geophysics, Hydrology, All tags... Oxnard, USGS Science Data Catalog (SDC), Water Quality, Water Resources, borehole logs, mud logs, oil and gas, Fewer tags Geochemical, geological, and geophysical data for wells in the Poso Creek Oil Field area, Kern County, California (ver. 2.0, September 2021) The U.S. Geological Survey (USGS) in cooperation with the California State Water Resources Control Board and the U.S. Bureau of Land Management compiled and analyzed data for mapping groundwater total dissolved solids (TDS) and characterizing clay layers and faults in the Poso Creek Oil Field in Kern County, California. Data for the Poso Creek Oil Field area include analyses of historical produced water samples from oil wells, borehole geophysical data, and geological formation depths. The data reported here are used in an accompanying interpretive manuscript that describes groundwater TDS, stratigraphic layers, and geologic structure in the study area. Some of these data were archived scanned pages in raster format... Categories: Data Release - Revised; Tags: California, Poso Creek, San Joaquin Basin, USGS Science Data Catalog (SDC), borehole geophysics, All tags... geologic formations, groundwater, groundwater quality, Fewer tags Geological, geochemical, and geophysical data from the Lost Hills and Belridge oil fields The U.S. Geological Survey (USGS) in cooperation with the California State Water Resources Control Board compiled and analyzed data for mapping groundwater salinity and characterizing aquifer systems in and near selected oil and gas fields in California. Data for the Lost Hills, North Belridge, and South Belridge oil fields include production and injection volumes, oil show data, formation pressure data, digitized borehole geophysical data, geochemical analyses of produced water samples, geological formation depths, and geophysical data associated with estimating groundwater total dissolved solids (TDS) of formation water. All data reported here are used in an accompanying interpretive manuscript. These data have... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Aquifer architecture, Borehole geophysics, California, Central Valley, Groundwater salinity, All tags... Lost Hills, North Belridge, Oil and gas, South Belridge, USGS Science Data Catalog (SDC), inlandWaters, Fewer tags