CN102733794B - One kind of probe plug sand surface by squeezing the sand test method - Google Patents

One kind of probe plug sand surface by squeezing the sand test method Download PDF

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CN102733794B
CN102733794B CN201210255207.4A CN201210255207A CN102733794B CN 102733794 B CN102733794 B CN 102733794B CN 201210255207 A CN201210255207 A CN 201210255207A CN 102733794 B CN102733794 B CN 102733794B
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sand
plug
probe
surface
perforations
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CN102733794A (en
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郭艳萍
韩文哲
费节高
徐迎新
陈松
高红平
樊炜
张清龙
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中国石油集团川庆钻探工程有限公司长庆井下技术作业公司
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Abstract

本发明涉及一种通过试挤砂塞探砂面的方法,其特征为:本方法至少包括以下步骤:第一步:等待沉砂;第二步:试挤砂塞;第三步:探砂面;所述等待沉砂:待沉砂完成后通过油套同时泵注试挤砂塞,若多次试挤,压力上升到已改造层破裂压力以上10Mpa,则确定改造层已被有效封堵,最后采用连续油管携带井下工具串探砂面至待改造射孔段以下5米,若未遇砂面,则可进行下一层的改造。 The present invention relates to a plug probe test sand surface by squeezing the sand, wherein: the method comprises at least the following steps: first step: wait grit; Step: sand squeeze test plug; Step: Probe sand surface; the waiting grit: simultaneously pumping sand squeeze again grit after completion plug through the oil jacket, if multiple test pressing, pressure rises above the fracture pressure has been altered layer 10Mpa, it is determined that the transformation has been effectively block layer Finally, using coiled tubing carrying a downhole tool string to be sand surface probe transformation perforations 5 m or less, if not met sand surface, the transformation can be carried out in the layer. 通过试挤砂塞和探砂面两步确定改造层的封隔情况,由于对步骤进行了改进,使得在保证层间有效封隔的同时,节约了施工时间。 By pressing again the plug of sand and sand surface probe-step transformation layer where a packer is determined, since the step is improved, so that the layer at the same time ensure an effective seal between the compartments, saving construction time.

Description

一种通过试挤砂塞探砂面的方法 One kind of probe plug sand surface by squeezing the sand test method

技术领域 FIELD

[0001] 本发明涉及油气田勘探和开发领域中压后探砂面的一种方法,是专为连续油管水力喷射填砂分层压裂施工后,为确定层间有效封隔性而设计的一种通过试挤砂塞探砂面的方法。 After [0001] The present invention relates to a method for the exploration of oil and gas fields sand surface exploration and field development pressure, it is designed for coiled tubing hydraulic fracturing injection stratified sand filling, to determine the inter-isolation layer effectively designed for a sand test method squeezing plug probe through the sand surface.

背景技术 Background technique

[0002] 连续水力喷射填砂分层压裂技术在压后通过欠顶替形成砂塞实现层间封隔,为确定砂塞封隔的有效性,常规做法是通过连续油管携井下工具串进行实探砂面。 [0002] The continuous layer fracturing sand filling the water jet technique after forming replace sand under pressure through the plug to achieve zonal isolation, to determine the effectiveness of the packer plug of sand, it is common practice to carry through the coiled tubing downhole tool string solid Exploration sand surface. 但该方法存在探不到砂面或者可能发生卡钻的风险,给后期的施工带来很大的经济代价和施工风险。 However, this method has not sand surface exploration or possible risks of stuck pipe, a great deal of economic costs and construction risks to the construction of late. 分析认为,常规探砂面方法不适合连续油管压后确定砂面是否满足有效封隔的要求。 Analysis, the conventional probe method is not suitable for sand surface after sand surface coiled tubing pressure is determined valid packer meets the requirements.

发明内容 SUMMARY

[0003] 本发明的目的是:为连续填砂分层压裂工艺提供一种通过试挤砂塞探砂面的方法来确定层间有效封隔。 [0003] The object of the present invention are: continuous fracturing sand filling process to provide a layered interlayer effectively determined by the method of test packer plug extrusion sand sand surface of the probe. 该方法通过试挤砂塞压力上升情况确定施工层是否被有效封堵,有效封堵后探砂面至待改造层段以下五米探不到砂面就可直接对下一层进行改造,在保证层间有效封隔的同时,节约了施工时间,一定程度上实现了连续油管的高效压裂;同时解决了连续油管用传统探砂面(实探砂面位置)探不到砂面,或者探砂过程卡钻的风险。 This method again by squeezing the sand plug pressure rise is determined whether the construction is effectively blocking layer, effectively block the probe to the surface of the sand to be altered layer exploration than five meters in the following paragraphs can be directly on the sand surface layer transformation, the ensure effective zonal isolation between the layers at the same time, saves construction time, achieve an efficient fracturing of coiled tubing to a certain extent; coiled tubing while solving the traditional sand surface probe (probe real sand surface position) of the probe is less than sand surface, or explore the process of sand sticking risks.

[0004] 本发明的技术方案是:一种通过试挤砂塞探砂面的方法,其特征为:本方法至少包括以下步骤: [0004] aspect of the present invention is: a method for squeezing sand plug probe test by sand surface, wherein: the method comprises at least the steps of:

[0005] 第一步:等待沉砂; [0005] The first step: waiting for grit;

[0006] 第二步:试挤砂塞; [0006] Step: sand squeeze test plug;

[0007] 第二步:探砂面; [0007] Step: Probe sand surface;

[0008] 所述等待沉砂:待沉砂完成后通过油套同时泵注试挤砂塞,若多次试挤,压力上升到已施工射孔段破裂压力以上lOMpa,则确定已施工射孔段已被有效封堵,最后采用连续油管携带井下工具串探砂面至待改造射孔段以下五米,若未遇砂面,则可进行待改造射孔段的改造。 [0008] The wait grit: simultaneously pumping sand squeeze again grit After completion plug through the oil jacket, if multiple test pressing pressure has increased to a pressure above construction Lompa burst perforations, it is determined that the construction is perforated section has been effectively blocked, and finally the use of coiled tubing downhole tool string carrying sand surface to explore the transformation of perforations to be five meters or less, if not encounter sand surface, the transformation can be carried out renovation perforated interval.

[0009] 所述的试挤砂塞前等待沉砂4小时。 Squeezing the sand test [0009] The sand plug before the wait for 4 hours.

[0010] 所述的试挤砂塞,确定已施工射孔段是否被有效封堵时,连续油管小排量100-150L/min、环空以0. 3m3/min的排量,同时泵注助推砂塞到位,如果砂塞到位,压力上升到已施工射孔段破裂压力以上lOMpa时停泵,压力降到20Mpa以下后,再次试挤砂塞,压力再次达到已施工射孔段破裂压力上lOMpa,则确定砂塞到位,即已施工射孔段已被有效封隔。 Sand squeeze test [0010] The plug, determines whether the construction has perforations are effectively plugged, coiled tubing small displacement 100-150L / min, the annulus to 0. 3m3 / min displacement, while pumping after boosting sand plugs in place, plug in place if the sand, stop the pump when the pressure has been increased construction perforations to rupture more pressure lOMpa, 20Mpa pressure falls below once again try to squeeze sand plug, pressure has again reached construction perforations burst pressure on Lompa, sand plugs in place is determined, ie the construction perforations have been effectively packer.

[0011] 所述的探砂面时,下连续油管探砂面至待改造射孔段以下五米,若探不到砂面,则可进行待改造射孔段的改造,若射孔段被埋,或口袋留的不够,则进行冲砂作业。 [0011] When the probe sand surface, the coiled tubing to be sand surface probe transformation perforations following five meters, if exploration than sand surface, the transformation can be perforations transformation, if the perforations are buried, or left pocket is not enough, sand washing operation is performed.

[0012] 本发明的有益效果:一种适合连续油管填砂分层压裂中尤为重要的环节即确定砂塞分层的有效性的专用探砂面技术,改变了以往根据沉砂后直接下放管柱实探砂面的方法的局限性,利用试挤砂塞过程中压力上升情况以及待改造层段以下五米是否存在砂塞,来确定层间封隔分层的有效性。 [0012] Advantageous effects of the present invention: one for coiled tubing fracturing sandpack layered part that is particularly important in determining the effectiveness of technology-specific probe sand surface sand plug layered directly changed in the past according to the grit decentralized probe real limitations of the method of column sand surface by squeezing the sand test plug as well as the process pressure rises to be five meters intervals whether there is the transformation of the sand plug, to determine the effectiveness of zonal isolation delamination. 该方法一方面可以保证改造层的封隔效果,另一方面不会对改造层造成破坏。 The method one can guarantee packer effect transformation layer, on the other hand will not cause damage to the altered layer. 该方法作为一种新的探砂面方法,目前尚未发现国内有相关理论研宄,通过试挤砂塞探砂面方法,在一定程度上为连续油管填砂分层压裂工艺的填砂分层可靠性中提供了依据,为该新工艺在直井定向井中的推广应用起到一定的促进作用。 The method as a new method sand surface exploration, the country has not yet discovered the theory of a Subsidiary, plug the sand surface exploration methods through trial and crowded sand, to a certain extent as coiled tubing fracturing sand filling layered process of filling sand points reliability layer provides a basis, play a role in promoting new technology in vertical wells for the promotion and application of directional wells.

附图说明 BRIEF DESCRIPTION

[0013] 下面将结合实施例对本发明作进一步的说明。 [0013] below with reference to examples of the present invention will be further described.

[0014] 图1为本发明实施例的施工示意图, [0014] FIG. 1 is a schematic diagram of the construction of the present embodiment of the invention,

[0015] 图中:1、已施工射孔段;2、砂面;3、待改造射孔段;4、待改造射孔段以下五米。 [0015] FIG: 1, the construction has perforations; 2, sand surface; 3, until the transformation of perforations; 4, transformation of perforations to be the following five meters. 具体实施例 Specific Example

[0016] 实施例1 [0016] Example 1

[0017] -种通过试挤砂塞探砂面的方法,其特征为:本方法至少包括以下步骤: [0017] - the test species by the method of extrusion of the sand plug probe sand surface, wherein: the method comprises at least the steps of:

[0018] 第一步:等待沉砂; [0018] The first step: waiting for grit;

[0019] 第二步:试挤砂塞; [0019] Step: sand squeeze test plug;

[0020] 第二步:探砂面; [0020] Step: Probe sand surface;

[0021] 所述等待沉砂:待沉砂完成后通过油套同时泵注试挤砂塞,若多次试挤,压力上升到已施工射孔段1破裂压力以上lOMpa,则确定已施工射孔段1已被有效封堵,最后采用连续油管携带井下工具串探砂面至待改造射孔段以下五米4,若未遇砂面2,则可进行待改造射孔段3的改造。 [0021] The wait grit: simultaneously pumping sand squeeze again grit After completion plug through the oil jacket, if multiple test pressing, pressure rises above the perforations have a construction Lompa burst pressure, it is determined that the construction has been emitted a bore section has been effectively block, and finally use of coiled tubing carrying a downhole tool string to be sand surface probe transformation perforations 4 the following five meters, if not met sand surface 2, can be modified to be perforated section 3 transformation.

[0022] 实施例2 [0022] Example 2

[0023] 如图1所示,2012年5月对苏里格气田一口开发井SD3-69xx井开展了连续油管填砂分层压裂新工艺试验,砂塞分层一次性成功。 [0023] As shown, in May 2012 Sulige gas field development wells SD3-69xx a well conducted coiled tubing fracturing sand filling stratification test new technology, one-time success stratified sand plug 1. 试验采用长庆井下自主研发的连续油管压裂施工专用井口装置及井下工具,施工中途确定砂塞分层的有效性采用了新式探砂面方法,即试挤砂塞探砂面方法,每层砂塞试压两次,压力上升明显,试压后探砂面至待改造层段以下五米4,未见砂面。 Test uses a downhole coiled tubing fracturing CHANGQING independently developed special wellhead and downhole tools, construction sand plug halfway determine the effectiveness of using the new layered sand surface probe method, i.e. extrusion test probe plug sand graining method, each sand two pressure test plug, the pressure increased significantly, the pressure test probe to the surface of the sand layer to be the transformation of the following paragraphs 4, no sand surface five meters.

[0024] 该井施工三层,两次填砂分层,山2下主压裂施工结束后填砂分层山2下、山2上; 山2上主压裂施工结束后填砂分层山2上、盒8层。 [0024] The construction of three wells, sand filling two layers were separated and the lower end of the main fracturing layered mountain sand hill 2 under filling 2, 2 on mountain; Mountain 2 after the main fracturing sand filling stratified 2 on the mountain, the cassette 8 layers.

[0025] 现以该井山2上、盒8两层间通过试挤砂塞探砂面方法对发明作以说明。 [0025] In the now well Hill 2, between two layers of the cassette 8 by squeezing the sand plug probe test method graining the invention will be explained.

Figure CN102733794BD00041

[0027] (1)山2上主压裂结束,填砂后沉砂。 2 on [0027] (1) Mount a main fracturing end, after filling sand grit.

[0028] 山2上:2964. 0-2964. 5m压后通过欠顶替形成砂塞,连续油管上提200米至2264m 关井等待沉砂。 [0028] On Shan 2: After formation of sand plugs 2964 0-2964 5m under pressure through replacement, the coiled tubing 200 m to 2264m provide shut waiting grit.

[0029] 山2上填砂结束时间(关井时间):2012年5月22日17:00; [0029] 2 mountain sand filling end time (shut-in time): 2012 at 17 o'clock on May 22;

[0030] (2)试挤砂塞。 [0030] (2) again squeezed sand plug.

[0031] 第一次试挤:2012年5月22日19:30,即沉砂2. 5小时。 [0031] The first trial squeeze: 2012 at 19:30 on May 22, that grit 2.5 hours.

[0032] 油套同注试挤砂塞,套管排量0.3m3/min、连续油管排量0.15m3/min试压,同时压实砂塞,通过试压压力变化判断,下层裂缝有开启现象,停泵继续等砂塞沉降。 [0032] Note again squeeze the oil jacket with sand plugs, casing displacement 0.3m3 / min, coiled tubing 0.15m3 / min pressure test displacement, while the sand compaction plug, determined by the test pressure change, there is a lower open fracture phenomena , stop the pump continue to wait for sand plug settlement.

[0033] 试挤砂塞不成功原因分析:沉砂时间2. 5小时,沉砂时间不够。 [0033] try to squeeze sand plug unsuccessful Analysis: time of 2.5 hours grit, grit lack of time.

[0034] 第二次试挤:2012年5月22日21:00,即累计沉砂4(2. 5+1. 5)小时。 [0034] The second test pressing: 2012 at 21:00 on May 22, i.e., accumulated sand 4 (25 + 15.) H.

[0035] 套管排量0.3m3/min、连续油管排量0.15m3/min试压,同时压实砂塞,两次试压升至42MPa(山2上破裂压力31. 8MPa),试压合格,准备探砂面; [0035] The displacement of the sleeve 0.3m3 / min, coiled tubing 0.15m3 / min pressure test displacement, while the sand compaction plug, two raised to 42MPa pressure test (burst pressure of the mountain 31. 8MPa 2), pressure test prepared sand surface probe;

[0036] 沉砂4小时后试压至已施工段山2上破裂压力以上lOMPa,试挤砂塞合格。 [0036] After the pressure test sand four hours to break above construction has 2 sections pressure lOMPa mountain, try squeezing sand plug qualified.

[0037] (3)探砂面。 [0037] (3) Probe sand surface.

[0038] 连续油管携井下工具串探砂面,连续油管下放速度13m/min,(理论上不大于15m/ min),连续油管排量100L/min,下连续油管至2850米(距设计砂面位置80米左右),停止连续油管泵注,继续下钻探砂面,探至2970米,连续油管悬重无变化,说明待改造层盒8层未被砂塞填埋,且盒8射孔段:2964-2964. 5m以下至少留有五米口袋。 [0038] The downhole tool string of coiled tubing carrying the probe sand surface, coiled tubing lowering speed 13m / min, (theoretically no greater than 15m / min), the displacement of the coiled tubing 100L / min, the coiled tubing to 2850 meters (from the sand surface design position 80 meters), coiled tubing stops pumping, the drilling continues sand surface, ground to 2970 m, coiled tubing hanging weight did not change, indicating that the cartridge 8 to be altered layer stopper layer is not filled with sand, and the perforations cartridge 8 :. 2964-2964 5m or less left at least five meters pocket.

[0039] 之前在其他施工过程中,采用过直接探至改造层面的方法,但该方法容易对改造面造成破坏,使原有的封隔面产生空洞,因此采用了探至距离封隔面五米的方法,结果表明,该方法效果良好,不会对封隔面造成破坏。 [0039] In other prior to the construction process, by direct use of the probe to level transformation method, but the method is easy to cause surface damage to the transformation, so that the original voids packer surface, thus using the distance from the probe to the surface of five packer the method of rice, the results show that the good effect, without causing damage to the packer surface.

[0040] 综上,用试挤砂塞探砂面方法完全能满足连续油管填砂分层压裂工艺中,连续油管探砂面确定层间有效封隔情况。 [0040] In summary, with the test probe plug sand squeeze method sand surface can meet layered coiled tubing fracturing sand filling process, coiled tubing sand surface probe determines the effective interlayer case packer.

[0041] 本发明中未提及的结构,装置和工艺步骤均为行业内公知技术,在此不一一赘述。 Structure, apparatus and process steps [0041] of the present invention are not mentioned known technique in the industry, which are not detailed herein.

Claims (2)

1. 一种通过试挤砂塞探砂面的方法,其特征为:本方法至少包括以下步骤: 第一步:等待沉砂; 第二步:试挤砂塞; 第二步:探砂面; 所述等待沉砂:待沉砂完成后通过油套同时泵注试挤砂塞,若多次试挤,压力上升到已施工射孔段(1)破裂压力以上lOMpa,则确定已施工射孔段(1)已被有效封堵,最后采用连续油管携带井下工具串探砂面至待改造射孔段以下五米(4),若未遇砂面(2),则可进行待改造射孔段(3)的改造;所述的试挤砂塞前等待沉砂4小时;所述的探砂面时,下连续油管探砂面至待改造射孔段以下五米(4),若探不到砂面(2),则可进行待改造射孔段(3)的改造,若射孔段被埋,或口袋留的不够,则进行冲砂作业。 1. A method of extrusion test probe sand sand surface of the plug, wherein: the method comprises at least the following steps: first step: wait grit; Step: sand squeeze test plug; Step: Probe sand surface ; wait the sand: simultaneously pumping sand squeeze again grit after completion plug through the oil jacket, if multiple test pressing, pressure rises to construction has perforations (1) above fracture pressure Lompa, it is determined that the construction has been emitted bore section (1) have been effectively blocked, and finally use of coiled tubing carrying a downhole tool string to be sand surface probe transformation five meters or less perforations (4), if not met sand surface (2), can be emitted to transform transformation bore section (3); said plug sample before pressing waits grit sand 4 hours; the probe when the sand surface, the coiled tubing to be sand surface probe transformation five meters or less perforations (4), if exploration than sand surface (2), the transformation can be modified to be perforated section (3), if the perforations are buried, or pocket left insufficient, sand washing operation is performed.
2. 根据权利要求1所述的一种通过试挤砂塞探砂面的方法,其特征为:所述的试挤砂塞,确定已施工射孔段(1)是否被有效封堵时,连续油管小排量100_150L/min、环空以0. 3m3/min的排量,同时泵注助推砂塞到位,如果砂塞到位,压力上升到已施工射孔段(1)破裂压力以上IOMpa时停泵,压力降到20Mpa以下后,再次试挤砂塞,压力再次达到已施工射孔段(1)破裂压力上lOMpa,则确定砂塞到位,即已施工射孔段(1)已被有效封隔。 2. The method according to claim 1, wherein the plug probe through the sand surface is sand squeeze test, wherein: the test plug squeezing sand, construction perforations have been determined (1) whether the block is valid, the Coiled tubing small displacement 100_150L / min, the displacement of the annulus to 0. 3m3 / min, while pumping sand assist plug in place, the sand plugs in place if the pressure rises above construction has perforations (1) fracture pressure IOMpa when the pump stops, the pressure dropped to 20Mpa or less, try again crowded sand plug, pressure has again reached construction perforations (1) on burst pressure lOMpa, it is determined that sand plugs in place, ie construction of perforations (1) has been effective packer.
CN201210255207.4A 2012-07-23 2012-07-23 One kind of probe plug sand surface by squeezing the sand test method CN102733794B (en)

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CN201650197U (en) * 2010-04-26 2010-11-24 中国石油集团川庆钻探工程有限公司 Packer extruding and sealing device
CN102562017A (en) * 2010-12-29 2012-07-11 安东石油技术(集团)有限公司 Sand blasting, perforating and fracturing method

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US6640895B2 (en) * 2000-07-07 2003-11-04 Baker Hughes Incorporated Expandable tubing joint and through-tubing multilateral completion method

Patent Citations (3)

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US4813730A (en) * 1987-06-19 1989-03-21 Terral Ben D Retrieval device for a well control tool
CN201650197U (en) * 2010-04-26 2010-11-24 中国石油集团川庆钻探工程有限公司 Packer extruding and sealing device
CN102562017A (en) * 2010-12-29 2012-07-11 安东石油技术(集团)有限公司 Sand blasting, perforating and fracturing method

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