Determination of Hydraulic Fracture Direction, San Juan Basin, New Mexico

Yale, David P.; Strubhar, M.K.; Rabaa, A.W. El

doi:10.2118/25466-ms

Cited by 3 publications

(2 citation statements)

References 16 publications

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“…There is strong local evidence for NE-SW trending stresses at the southeastern corner of the basin (Yale et al, 1993; conjugate deformation bands in the San Ysidro area as described below) and in the Dakota outcrops at the northern edge of the basin (also described below). These may be related to late-Laramide, southwestward-directed overthrusting of the Nacimiento uplift and San Juan uplift respectively, due ultimately to the late-Laramide re-orientation of plate motions reconstructed by Bird (1998).…”

Section: Kinematic Model Of Stresses and Structural Elementsmentioning

confidence: 88%

“…The only published results of a study designed specifically to determine the present-day stress orientations (Yale et al, 1993) found a consistently NE-SW trend for the maximum horizontal compressive stress in four wells in one field. This field is located near Cuba, in the southeastern corner of the basin (Yale, personal communication, 1998).…”

Section: Subsurface Stressesmentioning

confidence: 99%

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Tectonic Setting and Characteristics of Natural Fractures in Mesaverde and Dakota Reservoirs of the San Juan Basin, New Mexico and Colorado

Lorenz¹,

Cooper²

2001

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A set of vertical extension fractures, striking N-S to NNE-SSW but with local variations, is present in both the outcrop and subsurface in both Mesaverde and Dakota sandstones. Additional sets of conjugate shear fractures have been recognized in outcrops of Dakota strata and may be present in the subsurface. However, the deformation bands prevalent locally in outcrops in parts of the basin as yet have no documented subsurface equivalent. The immature Mesaverde sandstones typically contain relatively long, irregular extension fractures, whereas the quartzitic Dakota sandstones contain short, sub-parallel, closely spaced, extension fractures, and locally conjugate shear planes as well. Outcrops typically display secondary cross fractures which are rare in the subsurface, although oblique fractures associated with local structures such as the Hogback monocline may be present in similar subsurface structures.Spacings of the bed-normal extension fractures are approximately equal to or less than the thicknesses of the beds in which they formed, in both outcrop and subsurface. Fracture intensities increase in association with faults, where there is a gradation from intense fracturing into fault breccia. Bioturbation and minimal cementation locally inhibited fracture development in both formations, and the vertical limits of fracture growth are typically at bedding/lithology contrasts. Fracture mineralizations have been largely dissolved or replaced in outcrops, but local examples of preserved mineralization show that the quartz and calcite common to subsurface fractures were originally present in outcrop fractures.North-south trending compressive stresses created by southward indentation of the San Juan dome area (where Precambrian rocks are exposed at an elevation of 14,000 ft) and northward indentation of the Zuni uplift, controlled Laramide-age fracturing. Contemporaneous right-lateral transpressive wrench motion due to northeastward translation of the basin was both concentrated at the basin margins (Nacimiento uplift and Hogback monocline on east and west edges respectively) and distributed across the strata depth.

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Section: Kinematic Model Of Stresses and Structural Elementsmentioning

confidence: 88%

Section: Subsurface Stressesmentioning

confidence: 99%

Tectonic Setting and Characteristics of Natural Fractures in Mesaverde and Dakota Reservoirs of the San Juan Basin, New Mexico and Colorado

Lorenz¹,

Cooper²

2001

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In-situ Stress Field Determination and Formation Characterization – Offshore Qatar Case History

et al. 1994

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Determination du champ de contrainte in situ et caracterisation de la formation - Cas precedent offshore Qatar In-situ Spannungsfeldbestimmung und Formations charakterisierung - Fallstudie Offshore Qatar ABSTRACT: This paper presents a comparison of several methods that can be used to obtain in-situ stress field data in an oil/gas well. In an offshore well recently drilled in the Arabian Gulf, the following techniques were used to acquire data used in the design of hydraulic fracture treatments for the well:Microfrac pressure analysis yielded information about the magnitude of the minimum principal stress.A borehole extensometer used during the microfrac testing gave additional information: the in-situ shear modulus, the orientation of the principal stress axes, the actual orientation of the created fracture, and the width of the fracture.An elastic strain recovery (ASR) was employed as a secondary method to determine the orientation of principal stress axes.Oriented coring after microfrac testing was used to recover a portion of the actual microfrac and determine the orientation.A borehole scanning record was used to determine the orientation of natural fractures.A multi-arm caliper log was used for wellbore ellipticity evaluation, while borehole breakout was used as an indicator for the orientation of principal stress axes. The results obtained are compared and discussed based on general knowledge of the regional stress field variations as obtained from geological surveys. In addition, rock properties obtained from core sample tests and from processing of an acoustic wireline record were compared with the data calculated from the wellbore extensometer. A comparison of the various methods for determining the magnitude and orientation of the in-situ stress field demonstrate the relative reliability, for this case, of the individual methods. This paper demonstrates the necessity of using several methods to obtain reliable in-situ stress data. Resume: Cette article technique presente une etude comparative de plusieurs miithodes qui peuvent etre utilisees pour obtenir des donnees de contrainte in situ dans un un puits d'huilelgaz. Dans un puits offshore recemment fore dans le golfe Arabique, les techniques suivantes ont ete employees pour recueillir les donnees utilisees dans les etudes des traitements de fracturation hydraulique pour le puits:L'analyse des pressions de microfracturation a donne des informations sur la grandeur de la contrainte principale minimum.Un Borehole Extensometer (Extensometre de trou fore) utilise pendant l'essai de microfracturation a donne des informations supplementaires; telles que le module de cisaillement, l'orientation des axes des contraintes principales, l'orientation de la fracture cree, et la largeur de la fracture.An elastic Strain Recovery (Retablissement de la deformation an elastique) a ete employee comme methode secondaire pour determiner l'orientation des axes des contraintes principales.Le carottage oriente apres l'essai de microfracturation a ete utilise pour recuptirer un echantillon de la roche microfracturee et determiner l'orientation de la microfracture.Une diagraphie "Directional Acoustic/Resistivity Imaging Log" a ete utilisee pour determiner l'orientation des fractures naturelles.Une diagraphie de diametrage faite avec un calibre a bras multiple a ete employee pour l'evaluation de l'ellipticite du trou fore en utilisant une brisure du trou fore comme indicateur de l'orientation des axes des contraintes principales. P. 905

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In-situ Stress Orientation and the Effects of Local Structure – Scott Field, North Sea

et al. 1994

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In-situ stress orientation was measured in 17 wells throughout the Scott field in order to predict the orientation of waterflood induced fractures. The Scott field is heavily faulted and significant variations in in-situ stress orientation were found between different fault blocks. The in-situ stress orientations appear to be strongly controlled by the orientation of the local faults and tectonics. The direction of maximum horizontal stress appears rotated 30° to 50° on either side of the NNW-SSE regional compression trend generally found in the North Sea. In most cases, the maximum horizontal stress is parallel to the orientation of nearby normal and wrench faults, as would be predicted by a tectonic model of such faulting. However, the tectonics of the region suggest that the rotation of the regional stress field from fault block to fault block is due to the presence of the faults rather than active faulting. The orientation of the in-situ stress was determined from shear acoustic anisotropy measurements on cores from 5 wells and from wellbore elongation measurements in 13 wells. The two methods show very similar orientations within the same fault block. No statistical variability in stress orientation was noted between different formations or with depth. Shear acoustic anisotropy utilizes the polarization of shear acoustic waves propagating through oriented core samples and has proven to be very reliable in determining stress orientation. The observed wellbore elongations in the field do not appear due to breakouts. The character, magnitude, placement, and orientation of the wellbore elongations strongly support the premise that the measured elongations were due to drilling or coring induced wellbore fractures. Previous experience by the authors and other recently published observations support this conclusion and the reliability of these elongations for the determination of stress orientation.

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Determination of Hydraulic Fracture Direction, San Juan Basin, New Mexico

Cited by 3 publications

References 16 publications

Tectonic Setting and Characteristics of Natural Fractures in Mesaverde and Dakota Reservoirs of the San Juan Basin, New Mexico and Colorado

Tectonic Setting and Characteristics of Natural Fractures in Mesaverde and Dakota Reservoirs of the San Juan Basin, New Mexico and Colorado

In-situ Stress Field Determination and Formation Characterization – Offshore Qatar Case History

In-situ Stress Orientation and the Effects of Local Structure – Scott Field, North Sea

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