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公开(公告)号：US5241475A
公开(公告)日：1993-08-31
申请号：US604670
申请日：1990-10-26
CPC分类号： E21B43/26 , E21B49/006 , E21B49/008
摘要： An implementation of the present invention will typically be performed through use of two test fracturing or "mini-frac" operations to determine formation parameters. A first mini-frac operation will be performed to determine the fluid efficiency of the formation, and a second mini-frac operation will be performed to determine a late time fluid leak-off coefficient. The data thus obtained will be functionally related to simultaneously solve integral expressions to determine the total volume of fluid lost during pumping and the total volume of fluid lost during shut-in in response to an assumed spurt time. The fluid loss values will then be functionally related to the established fluid efficiency to estimate an early time fluid leak-off coefficient. The early time fluid leak-off coefficient thus determined will then be applied in a balance equation to verify the accuracy of such value in response to the assumed spurt time. The assumed spurt time may then be varied and the above fluid loss values iteratively reevaluated until the balance equation is satisfied within an acceptable range of tolerance.
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公开(公告)号：US20110005753A1
公开(公告)日：2011-01-13
申请号：US12501814
申请日：2009-07-13
IPC分类号： E21B43/22
CPC分类号： E21B43/267 , C09K8/506 , C09K8/508 , C09K8/80
摘要： Methods for stimulating a high-permeability subterranean formation are disclosed. In one embodiment, a method comprises the step of selecting a target fracture geometry for a portion of a subterranean formation. The method further comprises the step of introducing a pad fluid comprising a fluid-loss-control additive into the portion of the subterranean formation to create or extend one or more fractures in the portion of the subterranean formation, wherein an amount of the fluid-loss-control additive is determined based at least in part on the target fracture geometry. The method further comprises allowing a barrier to form along at least a portion of the one or more fractures, wherein the barrier comprises the fluid-loss-control additive. The method further comprises introducing a slurry fluid comprising proppant particulates into the one or more fractures, wherein a tip screen-out occurs in at least one of the one or more fractures.
摘要翻译： 公开了刺激高渗透性地层的方法。 在一个实施例中，一种方法包括为地下地层的一部分选择目标断裂几何形状的步骤。 该方法还包括以下步骤：将包含流体损失控制添加剂的衬垫流体引入该地层的部分以产生或延伸该地下部分部分中的一个或多个裂缝，其中一部分流体损失 至少部分地基于目标断裂几何确定控制添加剂。 该方法还包括允许阻挡层沿着一个或多个裂缝的至少一部分形成，其中所述阻挡层包括流体损失控制添加剂。 所述方法还包括将包含支撑剂颗粒的淤浆流体引入所述一个或多个裂缝中，其中在所述一个或多个裂缝中的至少一个中发生尖端筛选。
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公开(公告)号：US07552648B2
公开(公告)日：2009-06-30
申请号：US11904705
申请日：2007-09-28
IPC分类号： G01N3/00
CPC分类号： G01N3/12 , G01N33/383 , G01N2203/0003 , G01N2203/0017 , G01N2203/0019 , G01N2203/0048 , G01N2203/0284 , G01N2203/0605
摘要： Methods of determining the mechanical properties of a sample include applying a first pressure condition to a first portion of the sample and applying a second pressure condition to the second portion of the sample, the second pressure condition being different than the first pressure condition.
摘要翻译： 确定样品的机械性能的方法包括将第一压力条件施加到样品的第一部分，并将第二压力条件施加到样品的第二部分，第二压力条件不同于第一压力条件。
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54.发明授权公开(公告)号：US07504366B2
公开(公告)日：2009-03-17
申请号：US11504938
申请日：2006-08-16
IPC分类号： C09K8/588
CPC分类号： C09K8/68 , C09K2208/28 , Y10T137/0391
摘要： Methods of treating a portion of a subterranean formation, comprising: providing an aqueous treatment fluid comprising water, and a friction reducing copolymer that comprises acrylamide and an acrylic acid ester; and introducing the aqueous treatment fluid into the portion of the subterranean formation. Methods of fracturing a subterranean formation comprising: providing an aqueous treatment fluid comprising water, and a friction reducing copolymer that comprises acrylamide and an acrylic acid ester; and introducing the aqueous treatment fluid into the subterranean formation at or above a pressure sufficient to create one or more fractures in the subterranean formation. Aqueous treatment fluids comprising: an aqueous fluid and a friction reducing copolymer that comprises acrylamide and an acrylic acid ester.
摘要翻译： 处理地下地层的一部分的方法，包括：提供包含水的水性处理流体和包含丙烯酰胺和丙烯酸酯的减摩性共聚物; 并将所述含水处理流体引入所述地层的所述部分。 压裂地层的方法，包括：提供包含水的水性处理流体和包含丙烯酰胺和丙烯酸酯的减摩性共聚物; 以及在等于或高于足以在地层中产生一个或多个裂缝的压力下将含水处理流体引入地下地层中。 水处理流体包括：水性流体和包含丙烯酰胺和丙烯酸酯的减摩性共聚物。
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55.发明申请公开(公告)号：US20080045422A1
公开(公告)日：2008-02-21
申请号：US11504938
申请日：2006-08-16
CPC分类号： C09K8/68 , C09K2208/28 , Y10T137/0391
摘要： Methods of treating a portion of a subterranean formation, comprising: providing an aqueous treatment fluid comprising water, and a friction reducing copolymer that comprises acrylamide and an acrylic acid ester; and introducing the aqueous treatment fluid into the portion of the subterranean formation. Methods of fracturing a subterranean formation comprising: providing an aqueous treatment fluid comprising water, and a friction reducing copolymer that comprises acrylamide and an acrylic acid ester; and introducing the aqueous treatment fluid into the subterranean formation at or above a pressure sufficient to create one or more fractures in the subterranean formation. Aqueous treatment fluids comprising: an aqueous fluid and a friction reducing copolymer that comprises acrylamide and an acrylic acid ester.
摘要翻译： 处理地下地层的一部分的方法，包括：提供包含水的水性处理流体和包含丙烯酰胺和丙烯酸酯的减摩性共聚物; 并将所述含水处理流体引入所述地层的所述部分。 压裂地层的方法，包括：提供包含水的水性处理流体和包含丙烯酰胺和丙烯酸酯的减摩性共聚物; 以及在等于或高于足以在地层中产生一个或多个裂缝的压力下将含水处理流体引入地下地层中。 水处理流体包括：水性流体和包含丙烯酰胺和丙烯酸酯的减摩性共聚物。
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56.发明授权公开(公告)号：US07004254B1
公开(公告)日：2006-02-28
申请号：US11156356
申请日：2005-06-17
IPC分类号： E21B43/27
摘要： Aqueous treatment fluids that comprise water, and a friction reducing copolymer that comprises acrylamide in an amount in the range of from about 60% to about 90% by weight and acrylic acid in an amount in the range of from about 10% to about 20% by weight. Methods of treating portions of subterranean formation using the aqueous treatment fluid that comprise providing an aqueous treatment fluid comprising water, and a friction reducing copolymer that comprises acrylamide in an amount in the range of from about 60% to about 90% by weight and acrylic acid in an amount in the range of from about 10% to about 20% by weight; and introducing the aqueous treatment fluid into the portion of the subterranean formation.
摘要翻译： 包含水的水处理流体和包含丙烯酰胺的摩擦降低共聚物，其量为约60％至约90％重量，丙烯酸的量为约10％至约20％ 重量。 使用包含提供包含水的水性处理流体的水性处理流体处理地下部分的方法和包含丙烯酰胺的摩擦降低共聚物，其量为约60％至约90％（重量），丙烯酸 其量为约10重量％至约20重量％; 并将所述含水处理流体引入所述地层的所述部分。
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57.发明授权
公开(公告)号：US5318123A
公开(公告)日：1994-06-07
申请号：US897358
申请日：1992-06-11
IPC分类号： E21B43/119 , E21B43/26 , E21B49/04
CPC分类号： E21B43/119 , E21B43/26
摘要： An improved method for fracturing oil wells is disclosed and claimed herein. In particular, the present invention involves the determination of the direction of fracture propagation, i.e., perpendicular to the minimum stress existing within a given formation and the alignment of perforations produced by a variety of perforating devices with the previously determined direction of fracture propagation. The methods disclosed and claimed herein will eliminate many problems encountered in the prior art, including reducing the pressure required to initiate fractures and reducing the undesirable effects of near well bore tortuosity.
摘要翻译： 本文公开并要求了一种用于压裂油井的改进方法。 特别地，本发明涉及确定裂缝扩展的方向，即垂直于给定地层内存在的最小应力的方向，以及由先前确定的裂缝扩展方向由各种穿孔装置产生的穿孔的对准。 本文公开和要求保护的方法将消除现有技术中遇到的许多问题，包括降低开始裂缝所需的压力并减少近井孔弯曲度的不良影响。
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58.发明授权
公开(公告)号：US5236040A
公开(公告)日：1993-08-17
申请号：US897325
申请日：1992-06-11
CPC分类号： E21B47/02 , E21B43/26 , E21B49/006 , E21B49/008
摘要： An improved method for determining the magnitude of the minimum principle horizontal stress within a formation is disclosed and claimed herein. In particular, the inventive method involves the use of a wireline retrievable circumferential acoustic scanning tool during an open hole microfracture test to determine the magnitude of the minimum principle horizontal stress in the formation.
摘要翻译： 本文公开并要求了一种用于确定地层内的最小原理水平应力的大小的改进方法。 特别地，本发明的方法涉及在开孔微裂缝测试期间使用电缆可回收的圆周声波扫描工具来确定地层中最小原理水平应力的大小。
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公开(公告)号：US5113942A
公开(公告)日：1992-05-19
申请号：US664708
申请日：1991-03-05
申请人： David E. McMechan
发明人： David E. McMechan
IPC分类号： E21B43/26
CPC分类号： E21B43/261
摘要： The present invention provides a reliable, high efficiency perforation breakdown process. The inventive process, which utilizes a treating fluid and ball sealers, can be used in all types of wells. In the inventive breakdown process, the number of perforations existing downhole which have already been opened but have not yet been temporarily sealed is determined from observed wellhead pressures and/or wellhead pressure changes. A treating fluid flow rate is then established such that (i) the treating fluid will continue to flow through the already opened perforations which have not yet been sealed at a velocity which is at least as high as the minimum effective sealing velocity but (ii) maximum safe wellhead pressure will not be exceeded when one or more additional perforations is sealed.
摘要翻译： 本发明提供了可靠的，高效率的穿孔击穿过程。 利用处理流体和球形密封剂的本发明方法可用于所有类型的井。 在本发明的击穿过程中，已经打开但尚未被暂时密封的井下存在的穿孔的数量是从观察到的井口压力和/或井口压力变化确定的。 然后建立处理流体流速，使得（i）处理流体将继续流过尚未被密封的已经打开的穿孔，其速度至少等于最小有效密封速度，但是（ii） 当一个或多个附加穿孔被密封时，不会超过最大安全的井口压力。
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公开(公告)号：US08082992B2
公开(公告)日：2011-12-27
申请号：US12501814
申请日：2009-07-13
发明人： Bradley L. Todd , David E. McMechan
IPC分类号： E21B43/267
CPC分类号： E21B43/267 , C09K8/506 , C09K8/508 , C09K8/80
摘要： Methods including the steps of selecting a target fracture geometry for a portion of a subterranean formation; selecting a target tip pressure and a target back flow pressure based at least in part on a calculation for the target fracture geometry; selecting a target surface pressure and a target bottom-hole pressure based at least in part on a calculation for the target tip pressure and the target back flow pressure; and introducing a slurry fluid comprising proppant particulates into one or more fractures in the portion of the subterranean formation. The surface pressure corresponds to the target surface pressure, and bottom-hole pressure corresponds to the target bottom-hole pressure.
摘要翻译： 方法包括以下步骤：为地下地层的一部分选择目标断裂几何; 至少部分地基于目标断裂几何的计算来选择目标尖端压力和目标回流压力; 至少部分地基于目标尖端压力和目标回流压力的计算来选择目标表面压力和目标底部孔压力; 以及将包含支撑剂颗粒的淤浆流体引入所述地下部分的一个或多个裂缝中。 表面压力对应于目标表面压力，底部孔压力对应于目标井底压力。
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